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Plant Trials


Every plant in North America is subject to at least one weather- or critter-related problem. What few gardeners realize, however is that these problems can be avoided by selecting plants that are more suitable for the specific region you live in. That's where trials come in!

Trials are the plant industry's way of measuring how well a particular variety will perform in different parts of the country and evaluating new plant varieties.  There are two kinds of trials:  University field trials which generally consist of beds where each plant is grown in a small plot (called a row trial), and public gardens, where plants are often put in display beds or pots.  Proven Winners sends plant material to both kinds of trials, and also conducts their own trials at test sites across North America.

By visiting a trial in your area, you will be able to see how plants perform in an environment similar to your own.  For instance, if there is a new Verbena that is tolerant to mildew, gardeners in the Midwest and Southeast would like to know about it. And while all Proven Winners varieties perform well in a range of environments, there will always be some that are better suited to certain regions than others.

Use our search function to find trial locations in your area where Proven Winner plants can be viewed and start your journey to a garden that is not only beautiful but also the longest-lasting

Different varieties are grown side by side for comparison.

See our Signature Garden locations

The Proven Winners® Signature Garden designation is a prestigious certification representing a partnership between Proven Winners® and elite, exclusive, high profile properties across the country.

The goal of this partnership is to develop a mutually beneficial collaboration involving the property’s staff horticulturists (or the landscape maintenance professional), the landscape architect or designer, and local nurseries or growers supplying Proven Winners® plants . . . all working together to develop a landscape and garden presentation featuring Proven Winners® prominently on the property.

Boerner Botanical Garden
9400 Boerner Drive
Hales Corner, WI
Open Daily to the Public 8 a.m. to Dusk, May through October
Admission is Charged
Champaign County Illinois Master Gardener Idea Garden
South Lincoln Avenue
Champaign, IL
Open Daily to the public
Kansas State University
35125 W. 135th St.
Olathe, KS
913-856-2335 ext. 100
Open to public May-Sept. M-F 8 a.m. to 4:30 p.m.
Michigan State University
500 S. Bogue St
East Lansing, MI
(517) 355-5191 ext. 1359
Open to the public Daily, Limited access November through March Limited parking is available in the gardens visitor lot, south of the Plant and Soil Sciences building on Bogue Street and Wilson Road. During university business hours (8:00 am to 6:00 pm) parking tokens are required to exit the lot and are available at the Visitor Booth for $3.00. At other times parking is free.
Missouri Botanic Garden
4344 Shaw Ave.
St. Louis, MO
open to the public daily, check web site for times
Admission is Charged.
Powell Gardens
1609 Northwest US Hwy 50
Kingsville, MO
Open to the public, see website for seasonal hours
Admission is Charged.
South Dakota State - McCrory Gardens
Brookings, SD
Dawn to Dusk
The Gardens at Ball
622 Town Road
West Chicago, IL
For more information: For visitor information, including times and directions, please call 888 800-0027
University of Minnesota - Grand Rapids
1861 E Hwy 169
Grand Rapids, MN
Open daily to the public, Horticulture Day August 27th
University of Minnesota - Morris
46352 State Hwy. #329
Morris, MN
Open Daily to the public, Horticulture Night TBA
For more information download PDF of the Top 10 Performing Annuals or search
University of Missouri
Columbia, MO
Bradford Farm: Bradford Research and Extension Center 4968 Rangeline Road Columbia, MO 65201 South Farm:
University of Wisconsin
8502 Mineral Point Rd
Verona, WI
Dawn to Dusk
For more information: Free to the public.
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