Here are some Web sites that can lead you to information about planting, caring for and understanding issues about trees.

Alliance for Community Trees (ACT) – national membership organization for local tree-planting groups

Casey Trees - The nonprofit organization planting American elms in Washington, DC.

TreeLink – The best site for resources, news and facts about trees and urban and community forestry

Riveredge Farms - Grows and sells disease-resistant Princeton American Elms

Elm Watch – Saving historic elms in New England

Sacramento Tree Foundation Save the Elms Program (STEP)

Department of the Interior, National Parks Service, Integrated Pest Management Dutch Elm Disease Manual

National Park Service -- Elms on the Mall

American Forests -- The nation’s oldest nonprofit citizens’ conservation organization

USDA Forest Service TreeSearch -- On-line index of Forest Service publications

National Tree Trust -- Provides resources that educate and empower people to grow and care for urban and community forests.

National Arbor Day Foundation – Tree guides, forums and much more

US National Arboretum -- Serves the public need for scientific research, education, and gardens that conserve and showcase plants to enhance the environment.