Able Farm and Gardening: Low Allergy Gardens
Thirteen tips by Elizabeth B. Tritt.
Allergy.com: Your Healthy Garden
Precautions, categorized lists of plants, and regional grass pollen seasons in US.
Asthma NSW: The Low Allergen Garden
Includes general guidelines, suitable and unsuitable plants for gardens in Australia, and plants that cause contact dermatitis.
Asthma UK: Low Allergen Gardens
General guidelines and suggested plants for gardeners in the United Kingdom.
Burke's Backyard: Low Allergy Gardens
http://www.burkesbackyard.com.au/1998/archives/26/in_the_garden/gardening_tips,_books,_techniques_an
Article on pollen-producing plants, including asthma weed, safe plants, and plants to avoid.
Children's Health Environmental Coalition: Al
Article by Pamela Lundquist with tips for reducing and avoiding pollen and mold, lists of plants to avoid and those that may be tolerable to allergy sufferers, and links.
Home and Garden Television: Allergies
Master gardener Paul James provides general guidelines for identifying allergy-causing plants and lists of plants to avoid.
Living and Breathing Garden
Low allergen garden at the Royal Horticultural Society Flower Show in 2003.