In Allergy-Free Gardening, author Thomas Ogren examines the role that urban landscaping plays in the increasing problems with allergies. This extensively researched, comprehensive, plant-by-plant reference helps gardeners and landscapers make educated choices about what to plant. Allergy-Free Gardening, by Thomas Ogren (Ten Speed Press, 2000; $23).
The Master Gardener program, conducted nationwide via the cooperative extension systems in each state, provides extensive training in horticulture to members of the community in exchange for volunteer work helping gardeners in their region. For a map with links to each state's Master Gardener program, visit the American Horticulture Society's Master Gardener Web page.