USA Cold Hardiness Zones
Helpful Hints for Plant Selection
Common Tree Problems
Apple pollination chart
Asian pear pollination chart
Cherry pollination chart
European pear pollination chart
Plum pollination chart
National Agroforestry Center:
Fruit Advisor: From University of Massachusetts:
Fruits and Nuts: From U.C. Davis
Pennsylvania State Fruit Research & Extension Center: Insect & disease problem diagnosis. Fruit tree culture.
West Virginia University site: Tree fruit production, pests & diseases common to the Eastern U.S.
Plant Disease Control:
Organic Materials Review Institute: Lists of what is allowed & prohibited for use in production, processing & handling of organic foods.
Royal Botanic Gardens/Kew Plant Databases: Plant information from England, similar climate to the Pacific Northwest.
Tree Guide: North American trees
USDA Plants Database: Photos & plant information
Agriculture Research Service:
Appalachian Fruit Research Station: Comprehensive Information on growing fruit.
Cooperative State Research, Education & Extension Service:
National Agriculture Library:
Plant I.D. & Management:
Forestry Degree.net: Top 100 Forestry Resources
Cornell University: Information regarding plant varieties with disease & insect resistance, & cold tolerance.
Cooperative Extension: Research-based information from America’s land-grant universities.
Plants for a Future: Information on the many uses of perennial plants, edible, medicinal, and more.
Missouri Botanical Garden: Good resource for plants, and information on cultivation.
Orange Pippin: Technical information on apples and other tree fruit.