- Burpee Gardens
 - Flowers, vegetables, bedding plants, and container gardens. Plus, an interactive section where gardeners can have questions answered by Burpee's experts. - Johnny's Selected Seeds
- Offers vegetable seeds, medicinal and culinary herb seeds, and flower seeds to the wholesale and retail market.
- Nichols Garden Nursery
- Herbs and garden seeds catalogue featuring new and unusual vegetables, herbs, and flowers.
- Thompson & Morgan Ltd
- Offerings include flower, vegetable, and herb seeds, as well as young plants.
- Territorial Seed Company
- Vegetable, flower and herb seeds available to the home gardener and to commercial growers; software, CDs and videos related to gardening.
- SBE
- Offers herb, vegetable, flower seeds, and more.
- Heirloom Seeds
- Old fashioned, open-pollinated vegetable, flower and herb seeds. Also free tips and questions answered on the site.
- Pinetree Garden Seeds
- Provides home gardeners with seeds in appropriately sized packages.
- Yankee Gardener
- Offers collections for the first time planter, children, vegetables, herbs, and flowers. Provides recipes, charts, maps, and other planting resources.
- Stokes Seeds
- Flowers, vegetables, herbs, and perennial seeds, also includes, garden accessories.
- Renee's Garden Seeds
- Offers flower, vegetable and herb seeds in colourful packets with growing tips and harvesting information.
- Vesey's Seeds Ltd.
- Specialise in seeds for short seasons.
- Select Seeds Antique Flowers
- Offers rare, old-fashioned flower varieties as well as starter plants, flowering vines, and more.
- Plantation House Tobacco Seeds
- Sells Virginia and Havanna seeds and provides instructions for growing and curing tobacco.
- Seedland.com
- Offers a wide range of different varieties and cultivars of grass seed.
- TomatoFest
- Offers organic and heirloom tomato seeds, gardening supplies, recipes, event information, and merchandise.
- Pennington Seed
- Includes lawn and forage seed.
- Sakata Seeds America, Inc.
- Wholesale distributor of flower and vegetable seeds.
- Victory Seed Company
- Family owned and operated packet seed company specialising in non-hybrid vegetable, herb and flower seeds.
- Ernst Conservation Seeds
- Wholesaler of wetland, upland, woodland, and wildflower seeds.
- Tomato Growers Supply Company
- Offers seeds for many varieties of tomatoes and peppers.
- Rocky Mountain Rare Plants
- Offering seeds for alpine plants.
- Dowdeswell's Delphiniums
- Includes history and growing information of delphiniums. Offering fresh delphinium seeds worldwide.
- Prairie Nursery
- Offers plants and seeds for ecological gardening and natural landscaping, as well as providing natural landscaping consulting services.
- Tree in a Box
- Offers seed kits for a variety of occasions.
- Gurney's Seed & Nursery Company
- Offering catalogue and online ordering.
- Pacific Coast Tropical Gardens
- Retailer of seeds of subtropical and tropical ornamentals, fruits, herbs, palms, rare and unusual species; and related books.
- Henry Field's
- Sells seeds for vegetables, herbs, perennials, lawns, roses, and other plants.
- Reimer Seeds
- Sells varieties of vegetable seeds for home gardens.
- Seeds Trust, Inc.
- Sells open-pollinated, heirloom seed adapted to cold, short seasons. International Seed Saving Institute educates about conservation of plant genetic resources and seed saving.
- Lehle Seeds
- Commercial producer of Arabidopsis seeds, plus links to Arabidopsis sites.
- Seeds by Size
- Seeds, commercial gene bank, vegetables, herbs, and more.
- Round Butte Seed Growers
- Suppliers of wholesale and retail speciality grass seeds, wildflower seeds, and pigeon food to the USA and Canada.
- Totally Tomatoes
- Sells primarily tomato and pepper seeds, as well as other garden vegetables.
- rarepalmseeds.com
- Offering a wide range of rare palm, banana, and cycad seeds from around the world for both collectors and large nurseries.
- Dill's Atlantic Giant
- Offering seeds, supplies, and tips for growing giant pumpkins.
- Jungle Seeds
- Offers exotic seeds for tropical bedding in the U.K., including hardy bananas and palms.
- Pure Land Ethnobotanicals
- Specialises in salvia divinorum, offers rare seeds, herbs, and extracts.
- Dominion Seed House
- Mail-order horticulture catalogue featuring seeds, flowers, annuals, and accessories.
- Tobacco Seed Company, The
- Sells a variety of tobacco seeds. Also includes growing advice.
- Glacial Ginseng Co.
- Grower and seed dealer.
- Richters Herbs
- Specialists in medicinal, culinary, and aromatic herb plants and seeds. Includes herb catalogue and information for consumer and wholesale customers. Offers tips on herbal animal care, kitchen herbs, and herb usage.
- Plantworld Seeds
- Specialising in rare and unusual perennials, garden plants, and flowers.
- Sunmark Seeds International
- Information and specifications for wildflowers, native grasses, turf, prairie and speciality seeds.
- Teakettle Enterprises Ltd.
- Wholesale grower and distributor of ornamental plant seeds. Large selection of palms.
- Brett Young Seeds Ltd
- Grain buyer and seed grower for local and international.
- Redwood City Seed Company
- Alternative seed company lists rare and endangered vegetables and specialises in hot peppers and herbs.
- Whatcom Seed Company
- Offering a wide variety of rare, exotic, and unusual seeds.
- Larner Seeds
- Sells native California seeds and plants. Also sells the book Gardening with a Wild Heart by Judith Larner Lowry.
- Semillas Zulueta, S.A.
- Native and wild seeds, and plants for revegetation, reclamation, environment, management and erosion control.
- Trelay Seed Company
- Supplying the midwest with seed corn, alfalfa, small grain, pasture mixes and more.
- California Hybrids
- Specialises in red and yellow tomato seed development with expertise in high yield, high flavour varieties.
- Shaman Australis Ethnobotanicals
- Offering ethnobotanicals from Australia and the world, specialising in rare and endangered plants. Includes seeds of the Mitragyna speciosa, Yohimbe, Ephedra, Pituri, and more.
- The Prairie Is My Garden, Seed Company
- Specialising in providing native wildflower and prairie grass seed, suitable for USDA growing zones 2-5.
- Rex's Seedco
- Tomato and Chinese vegetable seeds.
- Douglas-Michel Enterprises
- Dedicated to providing butterfly plants and seeds. Speciality is growing perennials that provide nectar for butterflies.
- Seeds Express
- Offers thousands of tropical varieties to choose from.
- Crosman's Seeds
- Provides flower, vegetable and grass seed. Also offers custom-printed packets.
- Pickseed Canada
- Range includes corn, forage, turf, and lawn seeds.
- Lonestar Seed Company
- Flower and vegetable seeds for gardeners, landscapers, and greenhouses.
- De Bruyn Seed Store
- Offers vegetable and flower seeds, seed potatoes, onion sets, flower bulbs, and field seeds.
- David Cheshire Seeds
- Specialises in rare, unusual, and wild Alpine and herbaceous plant seeds.
- PT. Selektani
- Grows and offers horticultural seeds for the Indonesian and international market.
- Krazy Keith's Garden Shed
- Sells annuals, perennials, seeds, plants, bulbs, and more.
- Buy Pasture Grass
- Offers pasture grass seeds, red clover, hairy vetch, deer feed varieties, and other pasture mixtures.
- Grow From Seed
- Large variety of plant and flower seeds including many organic vegetables.
- Beaver Seed Company, The
- Offers Native American seeds, plants, beads, flutes, and speciality items.
- Underwood Gardens
- Specialising in rare, heirloom seeds for unusual vegetables, herbs and flowers, hard-to-find varieties, antique apples, and more.
- seeds2you.com
- Online seed shop. Also provides gardening advice, tips, and more.
- Tea Herb Farm
- Seeds, organic produce, and herbs.
- Urban Garden
- Online shop for vegetable, flower, herb, and ornamental grass seeds and garden accessories. Quick shipping available.
- Albright Seed Company
- includes information on plant science, turf grass, wildflowers, beneficial fungi, fertilizers, and more.
- Angelgrove Tree Seed Company
- specialises in seeds suitable for the North American climate, including those of shrubs and Japanese ornamental, flowering, and bonsai trees.
- Borghese Gardens
- importing and distributing rare seeds. Offering catalogue and mail order services.
- Clifton Seed Company
- Distributor of hybrid vegetable seeds from major U.S. and foreign producers. Serving commercial growers and home gardeners throughout the country since 1928 from locations in Faison, North Carolina , Ft. Myers, Florida and Moultrie, Georgia.
- Cook's Garden
- offering traditional and hybrid vegetable, herb, and flower seeds. Also has gardening supplies, books and helpful information.
- Davis Plant and Seed Company
- Generic Seeds
- Offers garden seeds including vegetable, herb, and flower.
- Gourmet Gardener, The
- hard-to-find herbs, vegetables and edible flowers from around the world selected for the best flavour. Also including special gifts and books.
- Heirloom Tomatoes
- old fashioned tomato seeds for home gardeners, specialising in heirloom varieties.
- Native American Seed
- wildflower and prairie grass seeds.
- Passiflora
- selling wholesale and retail passion flower seeds and exotic plants.
- Plant World Seeds
- Online store for a variety of seeds. Site gives catalogue and information about the garden and nursery. Located in Newton Abbot, U.K.
- Secret Seeds
- Offers seeds of rare and unusual plants. Site gives collections and online shopping facility with instructions on importing seeds into different countries.
- Seed Guild, The
- unusual and rare seeds from around the world.
- Seed Library
- In addition to selling packets of heirloom seeds, the Seed Library runs a not-for-profit seed borrowing programme where backyard gardeners cooperate to save seeds with local history. Seed Library specialises in heirloom seeds for Northeast gardeners.
- Shepherd's Garden Seeds
- includes catalogue, newsletter, and recipes.
- Southern Exposure Seed Exchange
- mail-order source of heirloom and traditional varieties of vegetable, flower, and herb seed.
- Thompson & Morgan Garden Seeds
- Offers a huge selection of quality flower, vegetable and herb seeds including rare, award winning, new and exclusive varieties. Also provides growing information.
- Virtual Seeds
- for garden, home and farm.
- Weslyn Herb Farm
- offers herbs, scented geraniums, and hot peppers.
- William Moore Farms
- Offers several different varieties of ornamental grass seed that you can use all year long to keep your garden uniquely beautiful.
- WorldSeed
- offers vegetable, flower and herb seeds from the USA, U.K. and Italy.
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