123seed.com
Sells seeds for vegetables, flowers, herbs, tropicals, and keiki paste for orchid propagation. [English/French/German]
Albright Seed Company
Sells a range of seeds including turf grass, wildflower, shrub and trees.
B & T World Seeds
An extensive seed catalogue, specialising in rare and exotic seeds, bulbs, and plants.
Borghese Gardens
Seeds, seedlings and bulbs of rare and unusual trees, herbs, flowers, vegetables, and house plants.
Carter Seeds
Sells different varieties of tree, shrub, palm, wildflower, flower and cactus seeds in bulk quantities.
Clyde Robin Seed Company
California grower of flower seeds, offering individual species as well as region- and purpose-specific seed mixtures.
Dowdeswell's Delphiniums
Cultivation information, photographs and the opportunity to buy seed for English hybrid type delphinums.
Ed Hume Seeds
Seed farm in the US Pacific Northwest specializing in flower, herb, and vegetable varieties for short growing seasons and cool climates.
Egmont Seed Company
The largest supplier of flower seed to commercial nurseries and cut-flower growers in New Zealand. Now also available to the general public.
eSeeds.com
Single source for buying seed from brand name sellers, specialty suppliers and botanical/research gardens.
Fedco Seeds
A cooperative seed and garden supply company providing cold-hardy varieties in season, and gardening supplies year-round.
Ferry-Morse Seed Company
Offers a wide range of flower, herb, vegetable and lawn seeds.
Florabunda Seeds
Canadian sellers of wildflower, cottage garden, heirloom and unusual varieties of flowering plants.
Flower Art and Soul
Offers bulk flower seeds, including hard to find varieties and native grasses.
Garden Adventures
Offers exotic and domestic seeds for common and unusual ornamentals, vegetables, house plants and herbs.
Garden Trails
Sells a selection of seeds, promotional seeds and custom seed packet printing.
Gardens North
Canadian seedhouse specialized in hardy perennial seed for Northern gardens. Also offers gardening and seed-starting supplies, including GA-3 germination stimulator.
Harris Seeds
Markets vegetable and flower seeds as well as plants and growing supplies to gardeners and professional growers.
Henry Field's Seed and Nursery Co.
Sells seeds, perennials, live vegetable plants and trees.
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