- 4SeasonGreenhouse.com
 - Full service provider of greenhouse kits and gardening supplies online. - Aarons Creek Farms
- Offers PVC and metal hobby greenhouse kits and accessories, including natural gas and propane heaters for greenhouses, garages, and tool sheds.
- Advance Greenhouses
- Provides a large selection of greenhouses and accessories, specialises in freestanding kits and custom lean-tos.
- Alitex Greenhouses
- Manufactures traditional greenhouses in durable aluminium with a complete service from design to installation. Available in the U.K and USA.
- Alton Cedar Buildings
- Manufacturers of cedar greenhouses and summerhouses.
- American Greenhouse Kit Company
- Offers hobby greenhouse kits, growing supplies, and tips for backyard gardens.
- Atlas Greenhouse Systems
- Manufacturers of free standing, cold frame, transplant, and curtain systems greenhouses.
- Avag
- Greenhouse construction.
- B&T Grower Supply
- Offers greenhouse and nursery supplies including flower pots, hanging baskets, shade cloth, generators, weed killer, and backpack sprayers.
- BC Greenhouses
- Manufactures and sells hobby greenhouses kits and customised greenhouses built with aluminium frames and glass or polycarbonate glazing. Also provides greenhouse info centre and links.
- Carports USA
- Sells canopy and metal carports, both permanent and portable as well as greenhouses and animal kennel covers.
- Cedar-Built Greenhouses
- Manufacturers and suppliers of hand-crafted Western Red Cedar greenhouse kits, lean-to greenhouses, accessories, and customed designed greenhouses.
- Charley's Greenhouses
- Vendor of greenhouse kits, supplies, garden tools and gifts.
- Clayton Hill Greenhouse Company
- Designs, constructs, and installs custom greenhouses and conservatories for commercial and residential uses nationally.
- Curry's Greenhouses
- Manufactures galvanized steel greenhouse kits. Also offers plans and accessories.
- EnviroCept
- Supplier of greenhouse kits, coverings, plans, and accessories.
- Evergreen Greenhouse Mfg.
- Manufacturing hobby greenhouses in kit form for residential use.
- Everlast Greenhouse Manufacturing and Easy Living Conservatories
- Manufacturer of greenhouses, kits, solariums, garden rooms, and commercial greenhouses. Ships throughout North America.
- Gabriel Ash
- Manufacturer of traditionally-made cedar greenhouses, wooden glasshouses, summer houses, and cold frames.
- Garden Under Glass
- Distributor of greenhouses, solariums and conservatories, as well as accessories and replacement parts for hobbyists and commercial growers. Serving the East Coast from MA to MD.
- Gardenpod.com
- Offering a geodesic-inspired greenhouse for the residential gardener, as well as accessories and related products.
- Green House Kits, Supplies & Hammocks, Ltd.
- Offering greenhouse kits and accessories, gardening tools, outdoor furniture, and more.
- Greener Gardening
- Offers greenhouses, sheds, summerhouses, playhouses, wall gardens, and gardening accessories.
- Greenhouse Publishing Inc.
- Offers information on finding and purchasing greenhouses, including plans and supplies.
- Greenhouse Resource, A
- offers supplies, including exhaust, cooling, and heating equipment.
- Greenhouse Showcase
- Online retailer offering a large selection of portable greenhouses in a variety of sizes and styles.
- Greenhouse Supply
- Catalogue of manufacturers of aluminium and cedar greenhouses.
- Greenhouse World
- Greenhouses, greenhouse equipment, and greenhouse supplies for nurseries and growers.
- Greenhouses and Gazebos
- Independent guide to home greenhouses and gazebos with reviews, buying tips, and shopping links.
- Greenhouses Information
- Provides information on buying and setting up a greenhouse including retailer links for kits, supplies, and growing resources.
- Grow-It Greenhouses
- structures for residential, agricultural, horticultural, and industrial growers.
- Growing Spaces
- Offering energy efficient geodesic dome greenhouse kits.
- h2othouse.com
- List of greenhouse, sunroom, and conservatory plans, and links to web kits, catalogues, and books from vendor of Victorian conservatory kit.
- Harp's Tarps
- Manufacturers of custom made truck and industrial tarps, as well as agricultural shade cloth.
- Hobby Gardens
- Manufacturers of greenhouses and accessories for the hobbyist and commercial grower.
- Hoop House Greenhouse Kits
- Residential and light commercial greenhouses.
- International Greenhouse Company
- Offers commercial and hobby greenhouses, equipment, and supplies.
- Janco Greenhouses, Inc
- Manufactured by J.A. Nearing, Co. for residential, commercial and institutional operations.
- Klima-Gro
- Indoor electronic greenhouse used in homes, apartments, offices and classrooms.
- Lexis Greenhouses and Supplies
- Sells Halls greenhouses, as well as garden and gift related products.
- Netafim Greenhouse
- Offers industrial and commercial greenhouses, water, nutrition, and irrigation systems. Provides greenhouse structures, equipment, and accessories, for turnkey and upgrade projects worldwide.
- Santa Barbara Greenhouses
- Selection of freestanding greenhouse kits and accessories.
- Sturdi-built Greenhouses
- Manufacturer of redwood greenhouses and accessories for residential use.
- Sun Country Greenhouse Company, The
- Builder and supplier of cedar and polycarbonate hobby greenhouse kits and plans.
- Sundance Supply
- Offering polycarbonate, fans, shade cloth, heating equipment and misting equipment for greenhouses and sunrooms.
- Sunglo East Greenhouses
- Freestanding and lean-to style greenhouse kits.
- Sunshine GardenHouse
- Manufacturer of redwood framed hobbyist greenhouse kits.
- Texas Greenhouse Company
- Manufacturers and sells residential and commercial greenhouses and greenhouse systems. Also sells greenhouse accessories and supplies.
- Turner Greenhouses
- manufacturer of freestanding and lean-to hobby greenhouses for gardeners throughout the U.S.
- Yard Works
- Selection of greenhouses and accessories for the hobby gardener.
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