LibGuides: Recommended Websites: General Information and Resources

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.
Cornell Department of Horticulture
Cornell University's College of Agriculture and Life Sciences School of Integrative Plant Science website.
Frost Chart for the United States
First and last average frost dates for major American and Canadian cities, plus the number of days in the average growing season for each city.
Frost Dates for Washington
First and last average frost dates for 23 major Washington state cities from Aberdeen to Yakima.
Garden Web
A large community of online gardeners share their collective wisdom with you at this gateway site's GardenWeb Forums. Online forums are also available in six different European languages. The site also hosts a collection of articles from the Brooklyn Botanical Garden.
Garden.org
A community for gardeners with a forum for discussion and asking questions and an extensive database of plants with photos.
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Registered members can create blogs and list what plants they have to share or want to acquire. You can also listen to regular podcasts from site owners and avid gardeners Dave and Trish. This site will get you through the winter and let you share your gardening passion with like minded folk. Garden.org is published by the National Gardening Association.
Gardening in Washington State
Facts, tips, and information for gardening in Washington.
Idaho Landscapes and Gardens
Published by the University of Idaho Extension, this well organized site contains articles on a wide variety of gardening topics such as fertilizing, transplanting trees, growing berries and growing Idaho native plants. Also included are links to contact the Master Gardeners or the Idaho Nursery and Landscape Association.
Northwest Flower & Garden Show
Philadelphia Flower Show
San Francisco Flower and Garden Show
Sequim Lavender Festival
Skagit Valley Tulip Festival
UBC Botanical Garden Forums
An on-line extension service based in Vancouver, this site also allows posts of photographs, scientific discussions and details from University of British Columbia research.
USDA Hardiness Zone Map
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.
WSU Extension Gardening in Eastern Washington
Facts, tips, and information for gardening in the Inland Northwest.
WSU Extension Hortsense
Answers to common gardening problems.
WSU Extension Programs
Agriculture and natural resources contacts and page links.