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| Joe Pye Weed Photo Courtesy of Iowa State University |
Colorado State University maintains perennial trial gardens at the W. D. Holley Plant Environmental Research Center (PERC) in Fort Collins, Colorado. The main objective of these gardens is to determine which herbacious perennials are best suited for growing in the Rocky Mountain area.
Check here for the list.
Superior Herbacious Perennials for the High Plains
