Underwood Gardens
- Specializing in rare, heirloom seeds and endangered varieties of vegetables, herbs and flowers.
- http://underwoodgardens.com

Heirloom Acres
- Grower and seller of heirloom vegetables and flowers. Bulk quantities available.
- http://www.heirloomacresseeds.com

New Hope Seed Company
- Growers and suppliers of open pollinated and heirloom vegetable and tobacco seeds. Includes a company profile and information about growing tobacco.
- http://www.newhopeseed.com/

Aunt Martha's Garden
- Offers a variety of heirloom garden seeds. Nonhybrid and open-pollinated.
- http://www.heirloom--seeds.com/martha.html

Amishland Heirloom Seeds
- Pennsylvania source for organically grown seeds for tomatoes, eggplants, and peppers, as well as other common and rare vegetables, and some flowers.
- http://www.amishlandseeds.com/

Heirloom Seeds
- Sells non-hybrid vegetable, flower, and herb seeds.
- http://www.heirloomseeds.com/

Diane's Flower Seeds
- Open-pollinated and heirloom garden seeds, for perennials, annual flowers, hand-crossed daylily hybrids, and herbs. Site also offers a series of gardening articles.
- http://www.dianeseeds.com/

The Cottage Gardener Heirloom Seed and Plant Nursery
- Heirloom plant nursery specializing in historic perennials and annuals, traditional herbs, and heirloom vegetables. Offers only seeds by mail order.
- http://www.cottagegardener.com/

Seed Savers Exchange
- Founded in 1975, this non-profit organization was a pioneer in the heirloom seed movement. Web site includes general information as well as an online catalog.
- http://www.seedsavers.org

Seeds Trust
- Offer heirloom, vegetable, wild flower and herb seeds to promote self-reliance and genetic preservation.
- http://www.seedstrust.com

Select Seeds
- Specializing in heirloom varieties of plants popular in the 19th century and before, particularly sweet peas.
- http://www.selectseeds.com/

TomatoBob.com
- Offers several hundred varieties of heirloom tomato and vegetable seeds. Site includes growing tips and a newsletter.
- http://www.tomatobob.com

The Victory Seed Company
- Offers open pollinated and heirloom vegetable, herb, and flower seeds. Includes information about the farm in Oregon.
- http://www.victoryseeds.com/

Heirloom Tomato Seeds
- Heirloom tomato seeds available along with growing tips and recipes.
- http://www.heirloomtomatoes.bizland.com/

Heirloom Tomato Seed Exchange
- Australian collector, selling heirloom tomato seeds.
- http://home.iprimus.com.au/ironbarkbob/seed/

Good Seed Company
- Open pollinated, heirloom and homestead seeds especially adapted for Northern gardens.
- http://goodseedco.net

Bountiful Gardens
- Offering seed for untreated heirloom and open pollinated vegetables, flowers, medicinal and culinary herbs. No GE seeds. Also has information on growing biointensively and sustainably.
- http://www.bountifulgardens.org

Botanikka Seeds
- Featuring rare and heirloom vegetable, herb and flower seeds, wholesale and retail sales.
- http://botanikka.com

Baker Creek Heirloom Seeds
- Growers and suppliers of non-hybrid seeds.
- http://www.rareseeds.com/

Anioleka Vegetable Seeds
- Over 100 varieties of heirloom tomatoes, as well as many varieties of eggplant, lettuce, cucumbers, peppers and other vegetables.
- http://www.seedfest.co.uk/