The Plant Environmental Research Center

Colorado State University Home Page
Plant Environmental Research Center Gardens:
Annual Flower Trial Garden
Herbaceous Perennial Garden
Other Landscape Plant Research Projects :
Green Roof Study




Welcome to the Plant Environmental Research Center (PERC) web site. The grounds area has been in operation for 43 years, and the greenhouses are celebrating their 65th year. Major changes are planned for PERC in 2015 due to the construction of a new stadium for the university. The greenhouses will be demolished around July 1st and new greenhouses and some research areas will be built a few blocks to the south east on Center Avenue. Most of the outdoor area will remain at its current location although some will be relocated to the new site on Center Ave. The perennial garden and the arboretum will remain. Plans are be developed to hopefully renovate the remaining area.

The PERC outside grounds were established so students, researchers and other interested persons can observe horticulture plant materials "in action." The grounds are free and open to the public any day during daylight hours. The Plant Environmental Research Center is located at 630 West Lake Street on the southwest corner of the CSU main campus. The Annual Flower Trial Garden which used to be located at PERC is now located approximately 0.75 mile directly to the east at the corner of College Avenue and West Lake Street.

There are no state funds directly allocated for the operation of the grounds at PERC. The Colorado State University Agricultural Experiment Station, Cooperative Extension Service and Department of Horticulture and Landscape Architecture assist by partially funding the salaries and research projects of many of the faculty involved at PERC. Financial assistance and/or plant materials for the ground areas have come from a number of sources including state horticultural professional associations, Colorado Nursery Research and Education Foundation, Colorado Floriculture Foundation, Specialty Crops Program, Colorado Garden Show, Inc., nurseries and seed companies across the nation and other horticulture-related industries.

Most plant material is labeled for easy identification. Woody plants have I.D. tags on the north side.

If you desire more information about some particular plant material or planting, please contact the professor in charge of that area.

Faculty and Staff (Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, Telephone 970-491-7019, FAX 970-491-7745, website:

Dr. S. J. Wallner, Department Head 491-7018
Dr. H. G. Hughes - Small Fruit 491-7050
Dr. J. E. Klett, Director PERC-Annuals/Perennials/Woody Ornamentals 491-7179
Dr. A. J. Koski - Turf 491-7070
Dr. S. E. Newman - Floriculture 491-7118
David Staats, Research Associate - Landscape Horticulture 491-2843
Sarah Wilhelm, Research Associate - Turf 491-7679

Numerous Master Gardeners from Larimer County assisted throughout PERC in the Annual Garden and Perennial Garden which is greatly appreciated.


Questions on landscape plants? Try PlantTalk™

*Plant Select®
*Green Industries of Colorado
*Colorado Nursery and Greenhouse Association
*Denver Botanic Gardens
Department of Horticulture and Landscape Architecutre, Colorado State University


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