How to prune trees
The objective of pruning is to produce strong, healthy, attractive plants. By understanding how, when and why to prune, and by following a few simple principles, this objective can be achieved.
Friend or foe? Find out what is lurking in your tree.
The U.S. National Arboretum Grove of Great American Trees
All 50 states have chosen a state tree, which is often linked to the state by important historical events, struggles in America’s War of Independence, early uses by settlers, or importance in the timber industry. Find out why your state adopted its tree.