Here are some of the mail order seed and plant suppliers I have used or have heard good things about in the past. Click on the name to bring you to their website.

W.Atlee Burpee CO. 1-800-888-1447, free catalog.
Comstock Ferre 1-860-571-6590, free catalog.
Deep Diversity   All organic!
Natural Gardening Company 1-707-766-9303, organic, free catalog.
Park Seeds   1-800-845-3369, great selection, free catalog.
Peaceful Valley Farm Supply 1-888-784-1722, organic, good selection of native grasses, free catalog.
Plants of the Southwest 1-800-788-7333, Native and drought tollerant plants and seeds.
Thompson & Morgan 1-800-274-7333, free catalog.
Wayside Gardens 1-800-845-1124, free catalog.
West Coast Seeds 1-604-482-8800, plants/seeds for the west coast, free catalog.