American Conifer Society
American Nursery & Landscape Association
American Society of Landscape Architects
Delaware Nursery & Landscape Association
International Society for Horticultural Science
International Plant Propagators Society
Kent County (MD) Chamber of Commerce
Landscape Contractors Association
Maryland Farm Bureau, Inc.
Maryland Nursery & Landscape Association
National Association of Plant Patent Owners
Pennsylvania Horticultural Society
Royal Horticulture Society
United States Chamber of Commerce
