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2025 PPA National Symposium
Monday, July 28
 

7:30am CDT

Jewel Box Tour
Monday July 28, 2025 7:30am - 5:45pm CDT
Tour stops:
Three Oaks Garden (Norris and McKinney Private Garden)
Enabling Garden
​Linda Grieve Private Garden
​Krause Gateway Center and Lunch
​Better Homes and Gardens Test Garden
​Susan Appleget-Hurst Private Garden
​Greater Des Moines Botanical Garden
Click here for more information on each stop.
Sponsors
avatar for Campion Hruby Landscape Architects

Campion Hruby Landscape Architects

Since its inception in 2010, Campion Hruby and its creative team have designed dozens of award-winning gardens in the Mid-Atlantic region and beyond. Our gardens are inspired by a combination of experience and imagination, and they forge connections between people, architecture, and... Read More →
avatar for Greater Des Moines Botanical Garden

Greater Des Moines Botanical Garden

From colorful unknowns to hidden delights under the dome, you’ll be surprised by what you’ll find in the Botanical Garden’s always friendly climate, no matter the season. Whether you want to explore our gardens, take in the art on exhibit in the North Gallery or in the Conservatory... Read More →

Monday July 28, 2025 7:30am - 5:45pm CDT
  Monday Tour

8:00am CDT

Taste of Iowa Tour
Monday July 28, 2025 8:00am - 5:45pm CDT
Tour stops:
Neal Smith National Wildlife Refuge
Brandy and Mosa Shayan Private Garden
Wilson's Orchard & Farm + Lunch
The Harkin Institute
Oak Park Restaurant and Edible Prairie
Greater Des Moines Botanical Garden
Click here for more information on each stop.
*This tour is recommended for those with accessibility needs.
Sponsors
avatar for Greater Des Moines Botanical Garden

Greater Des Moines Botanical Garden

From colorful unknowns to hidden delights under the dome, you’ll be surprised by what you’ll find in the Botanical Garden’s always friendly climate, no matter the season. Whether you want to explore our gardens, take in the art on exhibit in the North Gallery or in the Conservatory... Read More →

Monday July 28, 2025 8:00am - 5:45pm CDT
  Monday Tour

1:00pm CDT

Downtown Stroll Tour
Monday July 28, 2025 1:00pm - 5:45pm CDT
This is a walking tour of Downtown Des Moines. Bus transportation will be provided back to the hotel from the Botanical Garden.
Tour Stops:
Cowles Commons
World Food Prize Hall of Laureates
Robert D. Ray Asian Garden
Greater Des Moines Botanical Garden
Click here for more information on each stop.
Sponsors
avatar for Greater Des Moines Botanical Garden

Greater Des Moines Botanical Garden

From colorful unknowns to hidden delights under the dome, you’ll be surprised by what you’ll find in the Botanical Garden’s always friendly climate, no matter the season. Whether you want to explore our gardens, take in the art on exhibit in the North Gallery or in the Conservatory... Read More →

Monday July 28, 2025 1:00pm - 5:45pm CDT
  Monday Tour

4:00pm CDT

Meet Me in the Garden Tour
Monday July 28, 2025 4:00pm - 5:45pm CDT
Greater Des Moines Botanical Garden
Join us for an afternoon filled with exploration, learning, and community at one of Des Moines’ most cherished natural spaces!

Take our private coach to and from the hotel to the Garden and explore stunning landscapes, diverse plant collections, vibrant flower beds, and serene water features. Socialize over light refreshments and visit learning stations hosted by Garden Staff during your visit. All Monday Tours conclude at this gathering, making this "Meet Me in the Garden" option ideal for Attendees arriving that day who can’t participate in a full tour.
Sponsors
avatar for Greater Des Moines Botanical Garden

Greater Des Moines Botanical Garden

From colorful unknowns to hidden delights under the dome, you’ll be surprised by what you’ll find in the Botanical Garden’s always friendly climate, no matter the season. Whether you want to explore our gardens, take in the art on exhibit in the North Gallery or in the Conservatory... Read More →

Monday July 28, 2025 4:00pm - 5:45pm CDT
Greater Des Moines Botanical Garden 909 Robert D. Ray Dr, Des Moines, IA 50309, USA
  Monday Tour, Networking
 
Tuesday, July 29
 

8:00am CDT

Welcome
Tuesday July 29, 2025 8:00am - 8:15am CDT
Des Moines Marriott Downtown
Welcome to the 2025 National Symposium!

Special thanks to our local planning committee!
Aaron Harpold, Greater Des Moines Botanical Garden
Kara Hetrick, Reiman Gardens
David McKinney, Iowa Arboretum and Gardens
Kelly Norris, Author and Plantsman
Aaron Steil, Iowa State University Extension and Outreach
Ed Lyon, Spellbound Garden Writing & Consulting
Sponsors
avatar for New Moon Nursery

New Moon Nursery

Eastern native perennial plant material for landscape professionals, container production, storm water management, and restoration. New Moon grows all plant material in a deep plug. Our DP50 plug measures 2" x 4.5", 50 count per tray. The DP50 liner is suitable for planting directly... Read More →
avatar for Twixwood Nursery

Twixwood Nursery

Twixwood Nursery is one of the country’s premier wholesale growers of groundcovers, perennials, carex, and ornamental grasses. Located in the village of Berrien Springs, off the shore of Lake Michigan, Twixwood is conveniently located within 200 miles of Chicago, Detroit, Milwaukee... Read More →
Tuesday July 29, 2025 8:00am - 8:15am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

8:15am CDT

The Prairie – Past, Present and Future
Tuesday July 29, 2025 8:15am - 9:15am CDT
Des Moines Marriott Downtown
This presentation provides a historical overview of the origin of the North American Prairie ecosystem, its destruction by agriculture and human developments, and the resurgence in restoration meadows and gardens for contemporary landscapes to create habitat for pollinators, butterflies, birds, etc.
Speakers
avatar for Neil Diboll

Neil Diboll

President and Consulting Ecologist, Prairie Nursery
A pioneer in the native plant industry and recognized internationally as an expert in native plant ecology, Neil Diboll has dedicated his life to the propagation of native plants, promoting their benefits and furthering their use in gardens, landscapes and restoration projects. His... Read More →
Tuesday July 29, 2025 8:15am - 9:15am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

9:15am CDT

Ecological Responses to Climate Change: Lessons from the Past
Tuesday July 29, 2025 9:15am - 10:00am CDT
Des Moines Marriott Downtown
This talk focuses on the 6C (11F) global warming accompanying the end of the last ice age (19,000 to 8,000 years ago, a time well within human history and the evolutionary lifetimes of modern plants) as a model system for understanding how plants respond to changing climates. Using research on themes such as novel climates and ecosystems, abrupt changes in ecosystems, and the causes and consequences of past extinctions, Dr. Williams will expertly reveal how our past can help inform our future.
Speakers
avatar for Dr. Jack (John) Williams

Dr. Jack (John) Williams

University of Wisconsin
Expert on global warming and ecological responses to climate change, past and future. John is a professor of geography with the College of Letters and Science with the University of Wisconsin. His areas of interest include ecological impacts of global climate change, paleoecology... Read More →
Tuesday July 29, 2025 9:15am - 10:00am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

10:00am CDT

Landscape Design Awards Part I
Tuesday July 29, 2025 10:00am - 10:15am CDT
Des Moines Marriott Downtown
Tuesday July 29, 2025 10:00am - 10:15am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

10:15am CDT

Trade Show & Break
Tuesday July 29, 2025 10:15am - 11:00am CDT
Des Moines Marriott Downtown
Visit our Trade Show Exhibitors!
Coffee and snacks available in the Exhibit Hall.
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Tuesday July 29, 2025 10:15am - 11:00am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

11:00am CDT

Specialist Bees
Tuesday July 29, 2025 11:00am - 11:45am CDT
Des Moines Marriott Downtown
The monarch butterfly is probably the most famous insect specialist, but did you know that many native bees are also specialists? Female native bee specialists or oligoleges, collect pollen from a narrow range of native plants; this could mean just one plant genus or species, or many genera that belong to one plant family. Heather will highlight many of these native plant-bee specializations as well as the overlapping habitat requirements of the bees and plants. The presentation will also include the threats to specialists such as habitat loss and climate change. Take aways will involve not just understanding which plants to offer as a grower or include in a design, but also answer the “Why?”.
Speakers
avatar for Heather Holm

Heather Holm

Pollinator Conservationist and Educator
Heather Holm is a pollinator conservationist and award-winning author of four books: Pollinators of Native Plants (2014), Bees (2017), Wasps (2021), and Common Native Bees of the Eastern United States (2022). Both Bees and Wasps have won multiple book awards including the American... Read More →
Tuesday July 29, 2025 11:00am - 11:45am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

12:00pm CDT

Scholarship Winners and Outgoing Board
Tuesday July 29, 2025 12:00pm - 12:30pm CDT
Des Moines Marriott Downtown
Tuesday July 29, 2025 12:00pm - 12:30pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

12:30pm CDT

Young Professionals Lunch
Tuesday July 29, 2025 12:30pm - 2:00pm CDT
TBA
Plan to join the Perennial Plant Foundation for their second annual Young Professionals Lunch at a nearby restaurant. More details to come.

This will be a great opportunity to connect with other young professionals.
Exhibitors
avatar for The Perennial Plant Foundation

The Perennial Plant Foundation

The Perennial Plant Foundation fosters the future of the perennial plant industry through scholarships and activities that connect students and professionals across generations and levels of experience. Visit their booth to find out more and join PPF's events at the National Symp... Read More →
Tuesday July 29, 2025 12:30pm - 2:00pm CDT
TBA
  Foundation Event

12:30pm CDT

Trade Show & Lunch Break
Tuesday July 29, 2025 12:30pm - 2:00pm CDT
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Tuesday July 29, 2025 12:30pm - 2:00pm CDT
  Trade Show

2:00pm CDT

Landscapes That Connect Gardening Communities with Perennial Plants
Tuesday July 29, 2025 2:00pm - 3:00pm CDT
Des Moines Marriott Downtown
Understanding how Nature orders landscapes helps us to mimic her design and work in a new, more expansive way. As a result of Victorian collecting and current plant finding trips around the world that have created a readily available ‘supermarket’ of plants, many plantswomen and men require an understanding of how numerous nonnative species grow in their indigenous habitats, the type of plant communities surrounding them and the way they are ordered by Nature and utilized in their habitats. Appreciating this will lead to a new way of conscientious design.
Speakers
avatar for Wambui Ippolito

Wambui Ippolito

Owner & Founder, Wambui Design
Wambui Ippolito is an award-winning Landscape Designer and horticulturist who in 2021 was named one of “11 Revolutionary Female Landscape Designers and Architects Everyone Should Know" by Veranda Magazine. Her optic is influenced by an early childhood in the Great Rift Valley, and... Read More →
Tuesday July 29, 2025 2:00pm - 3:00pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

3:00pm CDT

Landscape Design Awards Part II and Perennial Plant of the Year®
Tuesday July 29, 2025 3:00pm - 3:20pm CDT
Des Moines Marriott Downtown
Tuesday July 29, 2025 3:00pm - 3:20pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

3:20pm CDT

Trade Show & Break
Tuesday July 29, 2025 3:20pm - 3:50pm CDT
Des Moines Marriott Downtown
Visit our Trade Show Exhibitors!
Coffee and light snacks available in the Exhibit Hall.
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Tuesday July 29, 2025 3:20pm - 3:50pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

3:50pm CDT

Designing Landscapes of Place
Tuesday July 29, 2025 3:50pm - 4:50pm CDT
Des Moines Marriott Downtown
Four concurrent goals in designing landscapes are that they are:
1.        Ecologically sound
2.        Aesthetically rich
3.        Dynamic, changing over time
4.        “Of the Place”
Darrel will relate how these goals are reflected in landscapes he has designed in different regions of the country, ranging from Montana, Texas, and Wisconsin, to Georgia, New York and Connecticut.  
Speakers
avatar for Darrel Morrison

Darrel Morrison

Honorary Faculty Associate, University of Wisconsin
Darrel Morrison is a renowned landscape architect and educator whose ecology-based approach to design has influenced generations of students and practitioners. Darrel taught at the University of Wisconsin-Madison and the University of Georgia-Athens (where he was Dean of the School... Read More →
Tuesday July 29, 2025 3:50pm - 4:50pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

4:50pm CDT

Trade Show Social
Tuesday July 29, 2025 4:50pm - 6:30pm CDT
Des Moines Marriott Downtown
Join us on the trade show floor for networking and refreshments.
Sponsors
avatar for American Beauties Native Plants

American Beauties Native Plants

Bar SponsorWe help you choose plants that are better for the environment, better for pollinators and better for your family by delivering expertly selected native plants that will bring you peace of mind, help you reconnect with nature and bring success and life to your garden.
avatar for Intrinsic Perennial Gardens, Inc

Intrinsic Perennial Gardens, Inc

Bar Sponsor​Our plants are bred and selected in the tough conditions of the Midwest with hot humid summers and cold wet winters. We strive to breed plants not as a means, but with an end in mind. Our goals are simple: improved, durable, ornamental garden plants for our own climate... Read More →
Tuesday July 29, 2025 4:50pm - 6:30pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

7:00pm CDT

PPF Trivia Night
Tuesday July 29, 2025 7:00pm - 9:00pm CDT
Big Grove Brewery
Join us for the second Perennial Trivia Extravaganza supporting the Perennial Plant Foundation!
You don’t need a team to register! Sign up individually, and you can organize teams during the symposium.
Bring your friends and compete for the title of Top Trivia Team!
Get more information and tickets here.
Exhibitors
avatar for The Perennial Plant Foundation

The Perennial Plant Foundation

The Perennial Plant Foundation fosters the future of the perennial plant industry through scholarships and activities that connect students and professionals across generations and levels of experience. Visit their booth to find out more and join PPF's events at the National Symp... Read More →
Sponsors
avatar for Twixwood Nursery

Twixwood Nursery

Twixwood Nursery is one of the country’s premier wholesale growers of groundcovers, perennials, carex, and ornamental grasses. Located in the village of Berrien Springs, off the shore of Lake Michigan, Twixwood is conveniently located within 200 miles of Chicago, Detroit, Milwaukee... Read More →
Tuesday July 29, 2025 7:00pm - 9:00pm CDT
Big Grove Brewery 555 17th Street, Des Moines, IA 50309
  Foundation Event
 
Wednesday, July 30
 

7:00am CDT

Grab and Go Breakfast
Wednesday July 30, 2025 7:00am - 9:30am CDT
Des Moines Marriott Downtown
Pick up a light breakfast and coffee before heading out for your tour day! 
Grab and Go Breakfast includes: Homemade Energy Bites, Whole Fruit, Greek Yogurt, Bottled Juice and Coffee.
Wednesday July 30, 2025 7:00am - 9:30am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Wednesday Tour

7:45am CDT

Bold and Beautiful Tour
Wednesday July 30, 2025 7:45am - 9:00pm CDT
Tour Stops Include:
Blank Performing Arts Center - Simpson College
Ted Lare Design Build & Garden Center
Allendan Seed Company
Covered Bridges Winery
Iowa Arboretum & Gardens
Reiman Gardens
Click here for more information on each stop.
*This tour is recommended for those with accessibility needs.
Sponsors
avatar for Reiman Gardens

Reiman Gardens

This is a special year at Reiman Gardens as we celebrate 30 years of inspiring awe and cultivating beauty at Iowa State University in Ames, Iowa! This milestone anniversary invites visitors to celebrate with party-themed garden displays and a year filled with signature events and... Read More →

Wednesday July 30, 2025 7:45am - 9:00pm CDT
  Wednesday Tour

8:30am CDT

Plants and People Tour
Wednesday July 30, 2025 8:30am - 9:00pm CDT
Tour stops:
Plant Life Designs
Bentley Ridge Tree Farm
​Iowa Arboretum & Gardens (lunch)
​North Central Regional Plant Introduction Station
​Hillside Hostas
​Reiman Gardens
Click here for more information on each stop.
Sponsors
avatar for Iowa Arboretum & Gardens

Iowa Arboretum & Gardens

Welcome to the Iowa Arboretum & Gardens, a community-supported public garden that inspires curiosity, discovery, and appreciation of the natural landscape. Immerse yourself in a world of tranquility and botanical excellence as you explore beautiful gardens, open-planted tree groves... Read More →
avatar for Reiman Gardens

Reiman Gardens

This is a special year at Reiman Gardens as we celebrate 30 years of inspiring awe and cultivating beauty at Iowa State University in Ames, Iowa! This milestone anniversary invites visitors to celebrate with party-themed garden displays and a year filled with signature events and... Read More →

Wednesday July 30, 2025 8:30am - 9:00pm CDT
  Wednesday Tour

9:00am CDT

Pollen to Plugs Tour
Wednesday July 30, 2025 9:00am - 9:00pm CDT
Tour Stops Include:
North Central Regional Plant Introduction Station
Iowa State University Seed Lab
Swift Greenhouses Inc & Lunch
Country Landscapes & Nursery - Ames
Ana and Ed McCracken Private Garden
Reiman Gardens
Click here for more information on each stop.
Sponsors
avatar for Reiman Gardens

Reiman Gardens

This is a special year at Reiman Gardens as we celebrate 30 years of inspiring awe and cultivating beauty at Iowa State University in Ames, Iowa! This milestone anniversary invites visitors to celebrate with party-themed garden displays and a year filled with signature events and... Read More →
avatar for Swift Greenhouses, Inc.

Swift Greenhouses, Inc.

Our goal at Swift Greenhouses, Inc. is to produce the highest quality, most consistent plugs and potted plants on the market for you, our customer, while fulfilling booked orders with the highest degree of accuracy and completeness.  We have been making gardens, families and homes... Read More →

Wednesday July 30, 2025 9:00am - 9:00pm CDT
  Wednesday Tour
 
Thursday, July 31
 

8:00am CDT

PPA Business Meeting
Thursday July 31, 2025 8:00am - 8:45am CDT
Des Moines Marriott Downtown
All members welcome to attend to learn more about board activities and association financials.
Thursday July 31, 2025 8:00am - 8:45am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Meetings

8:45am CDT

Design Track | Welcome
Thursday July 31, 2025 8:45am - 8:50am CDT
Des Moines Marriott Downtown
Attendees can choose to attend either session in the two tracks throughout the day on Thursday. No need to select a track in advance.

Special thanks to our local planning committee!
Aaron Harpold, Greater Des Moines Botanical Garden
Kara Hetrick, Reiman Gardens
David McKinney, Iowa Arboretum and Gardens
Kelly Norris, Author and Plantsman
Aaron Steil, Iowa State University Extension and Outreach
Ed Lyon, Spellbound Garden Writing & Consulting

Sponsors
avatar for New Moon Nursery

New Moon Nursery

Eastern native perennial plant material for landscape professionals, container production, storm water management, and restoration. New Moon grows all plant material in a deep plug. Our DP50 plug measures 2" x 4.5", 50 count per tray. The DP50 liner is suitable for planting directly... Read More →
avatar for Twixwood Nursery

Twixwood Nursery

Twixwood Nursery is one of the country’s premier wholesale growers of groundcovers, perennials, carex, and ornamental grasses. Located in the village of Berrien Springs, off the shore of Lake Michigan, Twixwood is conveniently located within 200 miles of Chicago, Detroit, Milwaukee... Read More →
Thursday July 31, 2025 8:45am - 8:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Design Track

8:45am CDT

Grower Track | Welcome
Thursday July 31, 2025 8:45am - 8:50am CDT
Des Moines Marriott Downtown
Attendees can choose to attend either session in the two tracks throughout the day on Thursday. No need to select a track in advance.

Special thanks to our local planning committee!
Aaron Harpold, Greater Des Moines Botanical Garden
Kara Hetrick, Reiman Gardens
David McKinney, Iowa Arboretum and Gardens
Kelly Norris, Author and Plantsman
Aaron Steil, Iowa State University Extension and Outreach
Ed Lyon, Spellbound Garden Writing & Consulting
Sponsors
avatar for New Moon Nursery

New Moon Nursery

Eastern native perennial plant material for landscape professionals, container production, storm water management, and restoration. New Moon grows all plant material in a deep plug. Our DP50 plug measures 2" x 4.5", 50 count per tray. The DP50 liner is suitable for planting directly... Read More →
avatar for Twixwood Nursery

Twixwood Nursery

Twixwood Nursery is one of the country’s premier wholesale growers of groundcovers, perennials, carex, and ornamental grasses. Located in the village of Berrien Springs, off the shore of Lake Michigan, Twixwood is conveniently located within 200 miles of Chicago, Detroit, Milwaukee... Read More →
Thursday July 31, 2025 8:45am - 8:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Grower Track

8:50am CDT

Design Track | Sowing Resilience: Research on Directly Sown Vegetation for Urban Green Infrastructure
Thursday July 31, 2025 8:50am - 9:50am CDT
Des Moines Marriott Downtown
Directly sowing custom seed mixes is an affordable, efficient, and sustainable approach to establishing vegetation in urban areas. However, empirical studies on direct sown vegetation systems in urban contexts are limited, especially in semi-arid climate regions. Despite having access to a wide variety of plants due to the relative ease of obtaining seeds compared to potted or rooted plants, establishing vegetation from seed is often viewed as having limited feasibility because of perceived low aesthetic value, challenges in maintaining optimal conditions for seed germination, and management issues. Michael will present experiments and case studies that evaluate the feasibility of installing vegetation systems from seed, specifically examining seed mix parameters, site preparation, and soil conditions necessary to support highly-diverse, ecologically valuable vegetation.
Speakers
avatar for Michael Guidi

Michael Guidi

Director of Horticulture Research, Denver Botanic Gardens
Michael Guidi is a horticulture researcher based in Denver, Colorado. One of his primary interests is the benefits of green infrastructure for urban biodiversity and the ecological patterns that emerge in these novel systems. His previous work has focused on how the unique conditions... Read More →
Thursday July 31, 2025 8:50am - 9:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Design Track

8:50am CDT

Grower Track | Accessing Plant Genetic Resources
Thursday July 31, 2025 8:50am - 9:50am CDT
Des Moines Marriott Downtown
Struggle to find unique genetics for breeding? Looking for specific provenances that might be the key to that next amazing cultivar or have potential to tolerate drier environmental conditions? Come hang out with horticulturist Jeff Carstens, curator for the horticulture project at the North Central Regional Plant Introduction Station to learn how to access the endless opportunities through the Germplasm Resources Information Network. Jeff is responsible for maintaining a diverse collection of woody and herbaceous plants. If you’re lucky, you might be the first to hear about a new perennial plant species that has yet to be named!
Speakers
avatar for Jeff Carstens

Jeff Carstens

Horticulturist, USDA North Central Regional Plant Introduction Station
Carstens works as a horticulturalist for the USDA North Central Regional Plant Introduction Station in Ames, Iowa, where he works with a team of scientists to expand the diversity of plant genetic resources collections in order to facilitate their conservation and utilization in... Read More →
Thursday July 31, 2025 8:50am - 9:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Grower Track

9:50am CDT

Design Track | Innovative Alternatives to Traditional Lawns
Thursday July 31, 2025 9:50am - 10:50am CDT
Des Moines Marriott Downtown
The session idea is built around a look at the low-maintenance lawn alternatives that our consumer base has been begging for - that happens to have an elevated aesthetic! Learn about diverse native grasses and sedges, explore the prairie/meadow lawn option and hear research-backed answers to give our consumers the environmental satisfaction they are hoping for - while also creating beautiful spaces.
Speakers
avatar for Liz Anna Kozik

Liz Anna Kozik

Research Scientist, Chicago Botanic Garden
Dr. Liz Anna Kozik (Phd Environment and Resources, UW Madison, MFA Design Studies, UW Madison, BFA Rhode Island School of Design) is a Research Scientist at the Chicago Botanic Garden whose research is focused on lawn alternatives. As one of the founding members of the Rethinking... Read More →
Thursday July 31, 2025 9:50am - 10:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Design Track

9:50am CDT

Grower Track | Propagating Native Prairie Plants
Thursday July 31, 2025 9:50am - 10:50am CDT
Des Moines Marriott Downtown
Across the fields and prairies, along the roadsides and wooded streams of Nebraska, grow native wildflowers, whose beauty rivals that of anywhere in the world. Join horticulturist Bob Henrickson on a guided pictorial tour across Nebraska to showcase these prairie gems.  Learn about propagating these native perennial wildflowers from seeds. From collecting, processing, storing and stratifying seeds, to germination and plant production.
Speakers
avatar for Bob Henrickson

Bob Henrickson

Horticulture Program Director, Nebraska Statewide Arboretum
Bob is the Horticulture Program Coordinator with the Nebraska Statewide Arboretum, Inc., a private, non-profit organization and program of the Nebraska Forest Service. His responsibilities include assisting affiliated arboretum sites across Nebraska with plant collections and to acquire... Read More →
Thursday July 31, 2025 9:50am - 10:50am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Grower Track

10:50am CDT

Trade Show & Break
Thursday July 31, 2025 10:50am - 11:30am CDT
Des Moines Marriott Downtown
Visit our Trade Show Exhibitors!
Coffee and snacks available in the Exhibit Hall.
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Thursday July 31, 2025 10:50am - 11:30am CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

11:30am CDT

Design Track | Panel: Effective Maintenance Strategies for Meadows and Prairies
Thursday July 31, 2025 11:30am - 12:30pm CDT
Des Moines Marriott Downtown
Join us for an engaging panel discussion focused on the maintenance of meadows and prairies, where experts from diverse regions share their insights and experiences. This session will explore the unique challenges and strategies involved in maintaining these vital ecosystems, emphasizing the importance of understanding different ecosystem scales, modes of maintenance, and tools used in various settings.  
Speakers
JM

John Mark Courtney

Owner, Kind Earth Growers
avatar for Ryan Drake

Ryan Drake

McCausland Natural Areas Manager, Morris Arboretum and Gardens of the University of Pennsylvania
Ryan Drake is the McCausland Natural Areas Manager at the Morris Arboretum and Gardens of the University of Pennsylvania. There he manages 110 acres of the arboretum property from constructed wetlands, streams, forests, meadows, as well as, the Bloomfield farm property including community... Read More →
T
Thursday July 31, 2025 11:30am - 12:30pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Design Track

11:30am CDT

Grower Track | Panel: Strategies for a Thriving Fall Perennial Program
Thursday July 31, 2025 11:30am - 12:30pm CDT
Des Moines Marriott Downtown
Join our expert panel for an in-depth session focused on developing a successful fall perennial growing program. This session will cover essential strategies and best practices that can help growers maximize their yields and ensure the health of their plants while leveraging the selling power of retail-ready fall perennials. Topics of discussion will include plant lists, scheduling, fertilization, lighting and more.
Speakers
avatar for Bryan Benner

Bryan Benner

Head Perennial Grower, Quality Greenhouses & Perennial Farm Inc.
Bryan is Head Perennial Grower at Quality Greenhouses and Perennial Farm in Dillsburg, PA, for the Perennials, Shrubs and Tree division.Bryan attended Delaware Valley University and graduated with a BS in Ornamental Horticulture. He is passionate about plants of all kinds and grows... Read More →
avatar for Chris Fifo

Chris Fifo

Perennial Products Representative, Darwin Perennials & Pan American Perennials
Chris Fifo is perennial products representative for both Darwin and Pan American Perennials. All things perennial. This is a natural role for him considering his background. Chris comes to Darwin and Kieft with 30 years of experience working with Swift Greenhouses in Iowa as Senior... Read More →
TK

Thad Kohlenberg

Grower Manager, Willoway Nurseries, Inc.
LR

Laura Robles

Regional Product Manager, Walters Gardens, Inc.
Thursday July 31, 2025 11:30am - 12:30pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education, Thurs Grower Track

12:30pm CDT

Trade Show & Lunch Break
Thursday July 31, 2025 12:30pm - 2:15pm CDT
Des Moines Marriott Downtown
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Thursday July 31, 2025 12:30pm - 2:15pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

2:15pm CDT

New to Market Forum
Thursday July 31, 2025 2:15pm - 3:30pm CDT
Des Moines Marriott Downtown
Join us for this rapid fire session on NEW PLANTS from ten companies!
Sponsors
avatar for Pleasant Run Nursery

Pleasant Run Nursery

New to Market Forum SponsorNew plant introductions and unusual containerized Woody Ornamentals, Vines, Perennials, Grasses, and Ferns are featured at Pleasant Run Nursery. Our focus is on native plants and hard-to-find solutions to site problems such as deer, shade and moist or dry... Read More →
Thursday July 31, 2025 2:15pm - 3:30pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

3:30pm CDT

Break
Thursday July 31, 2025 3:30pm - 3:50pm CDT
Des Moines Marriott Downtown
Coffee available in the Exhibit Hall.
Sponsors
avatar for GET Group, Inc.

GET Group, Inc.

We have been providing premium quality perennial and grass liners to the growing industry since 2002.  With  over 120,000 square feet of growing and propagation facilities, we produce over 400 varieties in 32 and 72 cell trays .
avatar for Gro 'n Sell

Gro 'n Sell

Break SponsorWe grow wholesale plants for independent garden centers, retail/wholesale greenhouses, landscapers, industry breeders, and cut flower growers. Our large product line is made up of thousands of varieties and several tray sizes so that we can cater to your specific needs... Read More →
avatar for Midwest Groundcovers

Midwest Groundcovers

Break SponsorAlthough Groundcovers are our specialty, Midwest Groundcovers’ plant offerings include Evergreens and Broadleaves, Deciduous Shrubs, Perennials, Ornamental Grasses, Vines and Native Prairie, Wetland and Woodland species. We are leaders in the Green Industry in partnering... Read More →
avatar for Plantworks Nursery

Plantworks Nursery

Break SponsorPlantworks is exlusively a wholesale supplier of herbaceous plants to the industry.  We offer a wide range of annuals, combos, daylilies, ferns, groundcovers, herbs, hosta, ornamental grasses, perennials, succulents, tropicals and vines. Plantworks is growing neonicotinoid... Read More →
avatar for Unex Inc.

Unex Inc.

Break SponsorUnex Inc. exports high quality flower bulbs and perennials, which are grown and cultivated in The Netherlands. As one of the leading Dutch exports, we specialize in high quality products for the North American, European and Asian market.We supply wholesale growers, garden... Read More →
Thursday July 31, 2025 3:30pm - 3:50pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Trade Show

3:50pm CDT

2026 National Symposium Announcement
Thursday July 31, 2025 3:50pm - 4:00pm CDT
Des Moines Marriott Downtown
Thursday July 31, 2025 3:50pm - 4:00pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

4:00pm CDT

Special Recognition Awards
Thursday July 31, 2025 4:00pm - 4:15pm CDT
Des Moines Marriott Downtown
Thursday July 31, 2025 4:00pm - 4:15pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

4:15pm CDT

Session 4
Thursday July 31, 2025 4:15pm - 4:45pm CDT
Des Moines Marriott Downtown
Speakers
avatar for Kelly Norris

Kelly Norris

Author and Plantsman
Kelly D. Norris is one of the leading horticulturists of his generation. In his practice, he explores the narrative of place through site-specific plantings and landscape interventions. An award-winning author and plantsman, Kelly’s work in gardens has been featured in The New York... Read More →
Thursday July 31, 2025 4:15pm - 4:45pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

4:45pm CDT

Closing
Thursday July 31, 2025 4:45pm - 4:45pm CDT
Des Moines Marriott Downtown
See you at another PPA event soon!
Thursday July 31, 2025 4:45pm - 4:45pm CDT
Des Moines Marriott Downtown 700 Grand Ave, Des Moines, IA 50309
  Core Education

6:30pm CDT

PPA Dine Around
Thursday July 31, 2025 6:30pm - 8:00pm CDT
TBA
Join other PPA folks for dinner Thursday night at one of the area restaurants and close out the week with friends new and old!

Sign ups will be onsite at the registration desk. Limited availability, so be sure to secure your spot for one of the dinner locations!

Exact dinner locations and group reservation times will be available onsite at registration.

Thursday July 31, 2025 6:30pm - 8:00pm CDT
TBA
 
Friday, August 1
 

8:00am CDT

Suggested Local Events
Friday August 1, 2025 8:00am - 6:45pm CDT
Consider extending your stay by one day to join a local event planned by other organizations, which will likely interest PPA attendees. Note: separate registration required through the links provided in the descriptions below.

Prairie x Design: a field experience
August 1, 2025 | 8:00a.m. - 6:45p.m. 
Buses depart from and return to Des Moines Marriott Downtown
A one-day, immersive field experience in central Iowa including prairie tours, expert guides, networking and happy hour. Separate registration required. CLICK HERE for details. Site visits include Marietta Sand Prairie, Doolittle Prairie State Preserve, Don Williams Recreation Area (lunch at picnic shelters) and Iowa Arboretum and Gardens.


Plantpeddler Trial Gardens & Variety Day
August 1, 2025 | 9:00a.m.- 4:00p.m.
Self-drive to Cresco, Iowa (about 3 hours North from Des Moines)
Evaluate the Trial Gardens, tour and interact with professionals, enjoy seminars, food and networking. This is a full day for horticulture professionals in production, distribution, wholesale and retail. RSVP is required and full details are available HERE.

Friday August 1, 2025 8:00am - 6:45pm CDT
  Suggested Local Events
 
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