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Additional Resources

Read Ask Ed’s September 2006 column “Hello Heat and Drought Stress on Green Roofs” by Ed Snodgrass and the January 2006 “Emory Knoll Farms? 2005 Green Roof Plant Trials” by Sarah Murphy and Ed Snodgrass here. Read about Emory Knoll Farms in The Greenroof Directory here.Purchase “Green Roof Plants: A Resource and Planting Guide,” by Edmund C. Snodgrass and Lucie L. Snodgrass, 2006 from Timber Press, Portland, OR here.

Emory Knoll Farms is a perennial nursery specializing in green roof plants, currently stocking over 100 varieties of green roof plants, and providing over 1 million sf of planted roofs. On October 1, 2002, Emory Knolls Farms initiated their test greenroof, trialling different plants, growing media substrates and depths. Since then they continue to try new plants under various climactic conditions, including the herbaceous testing shown in 2005 through 2006.

In the summer of 2007, Yale intern Ayehlet Cooper continued studies of plant trials; see her Ask Ed guest contributor column “Survivability, Aesthetic Value, and Seedling Dispersal of Hardy Herbaceous Plants on the Emory Knoll” for September, 2007 here.