Links about trees
Some links from Daria Gosztyla
Avoiding Excessive Soil Root System Trees
Defoliation and It’s Effect on Tree Vitality
Diagnosis of Injuries with References
Terminology for Diseases of Ornamental Plants
Topping- Tree Care or Tree Abuse
Longview Lake Sacajawea Arboretum
University of Washington Tree Map
The Right Tree in the Right Place
Tree Guide-wealth of information on height and spread, soil and sun requirements, leaves, history, wildlife habitat and more.
Pests of Landscape Shrubs and Trees-IPM