Emory Knoll Farms

Specialty Green Roof Nursery. Top products: Sedum varieties, Drought-tolerant perennials, Native green roof plants, Specialized groundcovers. Emory Knoll Farms, Inc., established in 1998, is a pioneering horticultural facility based in Street, Maryland, recognized as the first nursery in North America dedicated exclusively to green roof vegetation. The farm specializes in the cultivation and supply of highly resilient, drought-tolerant plants—particularly Sedum species and native perennials—engineered to survive the harsh environmental conditions of rooftop environments. Beyond mere plant production, the company functions as a technical resource for architects, landscape designers, and contractors, providing expert consultation and research-backed plant selection for commercial and institutional green roof projects across the United States. With over 16 million square feet of planting materials supplied to thousands of projects nationwide, the nursery emphasizes horticultural integrity, combining rigorous plant propagation standards with deep ecological expertise to ensure long-term vegetation success.