Links.

• American Public Gardens Association
• The Arnold Arboretum
• Bartram's Gardens
• Blithewold Mansion, Gardens and Arboretum
• Brandywine River Museum
• Buchart Gardens
• Cheekwood Botanical Gardens and Art Museum
• Dumbarton Oaks
• Garden History Links
• Goodell Gardens and Homestead
• Historic New England
• International Lilac Society
• Landis Valley Museum Heirloom Seed Project
• Longwood Gardens
• Massachusetts Horticultural Society
• Monticello
• Monticello - Jefferson Center for Historic Plants
• Niagra Parks (Nature and Gardens section)
• NY Botanical Gardens
• Old House Gardens
• Old Sturbridge Village
• Pennsylvania Horticultural Society
• Pennsylvania Native Plant Society
• Penn State Master Gardener Program
• Penn State University Consumer Horticulture Center
• Wintherthur