The Consumer Horticulture Center is a Penn State, Department of Horticulture effort to educate consumers in the commonwealth of Pennsylvania about horticulture and gardening-related topics.
NGA offers the Web's largest and most respected array of gardening content for consumers and educators, ranging from general information and publications to lessons and grants. Be sure to check out their how-to projects and videos.
AHS is one of the oldest national gardening organizations in the country. Their website provides a good starting point for finding other garden-related associations and societies, as well as information about specific plants and gardening practices.
The National Arboretum's Gardens and Horticulture page provides a wealth of resources including gardening questions and answers, pest management, and invasive plants. Be sure to look at the Arboretum's photo gallery.
The PLANTS Database provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
The Gold Medal Plant Award program of The Pennsylvania Horticultural Society recognizes trees, shrubs, woody vines and perennials of outstanding merit. The Gold Medal Plants database allows you to search and browse all of the winners since the program began in 1978.
