Abundant Life Seeds: Certified organic vegetable, flower, and herb seeds.
Appalachian Seeds: North Carolina sellers of organic seeds for a variety of heirloom and open pollinated vegetables, herbs and flowers.
Brother Nature: Specializing in organically grown, open pollinated flower, vegetable and herb seeds.
Ecogenesis Inc.: Canadian company selling seeds grown from publicly-owned genetic material. Site includes variety descriptions, but does not clearly differentiate between conventionally grown and certified organic seed.
Elixir Farm: Organic and biodynamically grown Chinese and North American medicinal plant seeds.
Genesis Seeds, Ltd.: Based in Israel, Genesis is a large producer of certified organic seeds of flowers, culinary herbs, medicinal herbs and vegetables.
Goûtzy organic seed: Wholesaler and retailer of garden seed certified organic and guaranteed gmo free : Edible flowers, vegetables, flowers and herbs. Only available in Canada.
Greta's Organic Gardens: Organically grown seeds, open-pollinated, heritage, vegetable, flowers, and herbs.
Herb Gully: Producers and supplier of certified organic herb seeds and plants.
Highmowing Organic Seeds: Offers seeds for vegetables, flowers, and cover crops, organically produced in Vermont.
Horizon Herbs: Organically grown medicinal herb seed of echinacea, goldenseal and 400 other species of plants.
Maple Bay: Offering non-certified organically grown hardneck and softneck seed garlic.
Natural Gardening Company: They sell certified organic seeds and plants, including heirloom tomatoes.
Polish Organic Tomato Seeds: US representative of a Polish producer of organic greenhouse tomato seeds.
Ready to Grow: UK site providing a range of unusual organically grown chilli (chile) seeds, and some non-organic exotic ornamentals including banana seeds and palm seeds.
Salt Spring Seeds: Promoting self-empowerment by providing untreated heirloom and heritage seeds to grow high-protein, good yielding, and great tasting crops.
Seeds of Change: Offers certified organic seeds and food, plus tools, books, and gifts available through online catalog.
Southern Exposure Seed Exchange: Seed-saving organization offers many varieties of heirloom and other open-pollinated vegetables that grow well in the southeastern U.S.
Sow Organic Seed Co.: Online catalog offering open pollinated seeds. Certified Organic.
Stellar Seeds: British Columbia grower of organic flower, herb and vegetable seeds
Tanager Song Farm: "Organically raised" heirloom tomato, bean, lettuce, pea and flower seeds.
Terra Edibles: Since 1992. Open-pollinated, heirloom seeds, organically produced. Offers tomato, vegetable, herb, flower, and sweet pea seeds.
Tomato Fest: Northern California seller of over 400 varieties of organic heirloom and open-pollinated tomato seeds. Also offers tomato related books, supplies, and gift items.
Tomatsidan: Organically grown tomato seeds from Sweden. There is an English list on the site, but most is in Swedish.
Two Wings Farm: Small Canadian family farm offers Certified Organic gourmet and heirloom seed. Specializing in tomatoes and salad greens suited to the shorter season.
Wild Garden Seed: Sellers of Certified Organic heirloom and other open-pollinated seed varieties adapted for the Pacific Northwest.
Windmill Point Organic Farm: Organic fruits and vegetables, organic seed catalog and heirloom tomato seeds available from Windmill Point Farm near Montreal, Canada