The United States National Arboretum gives a short history and explanation of the USDA plant hardiness zone map. Click on their link to the Zone Map to actually see the map and learn your climate zone. The site also lists representative plants by zone as well as an alphabetical list of popular woody plants and their respective zones.
Archives: Recommended Websites
Royal Horticultural Society Horticultural Advice
Help and advice problem solver, including links to advice on top pests and diseases.
Nine Keys to Disease Prevention
By Brooklyn Botanic Garden. A common-sense approach to plant disease prevention
Conversion Tables, Formulas and Suggested Guidelines for Horticultural Use
Samples tables include equivalents for liquid measure, dry measure and weight, metric system and fertilizer conversions, formulas for fertilizer calculations, and plant spacing guides.
Seattle Public Utilities Natural Lawn & Garden Care
How to reduce waste, conserve water, save time and money, and protect our environment and your family’s health – all while growing a beautiful yard
California Rare Fruit Growers
This society extends beyond California’s borders to provide information on fruit culture whatever your climate zone. It also has excellent bibliographic information and links to other relevant fruit sites.
King County Natural Yard Care
Information on five steps to natural yard care.