| 77HYDRO: An indoor garden site specializing in hydroponics. Offers questions and answers on hydroponics and indoor garden lights, as well as product information. |
| ACI Hydroponics: Manufactures hydroponic gardens, HID grow lights, carbon dioxide regulators, light movers, nutrients and greenhouses for home hobbyists and educators. |
| Albuquerque Hydroponics and Lighting: Offers a large selection of hydroponic systems, supplies and indoor plant grow lights. |
| American Hydroponics: Manufactures and retails hydroponic gardening supplies for hobby and commercial growers worldwide, with an emphasis on promoting clean water and recycling resources. |
| Autogrow Systems Ltd: Manufacturers of hydroponic dosers, test equipment and controllers for greenhouse automation. |
| CareFree Gardens: Provides equipment, training and supplies to grow plants a better way. Our selective use of technology enables you to grow bigger and better plants using hydroponics, rather than traditional soil-based agriculture. |
| Eco Enterprises: Supplier of hydroponics since 1972. Manufacturers of Ecogrow Plant Nutrient. Lighting, videos and books, meters, propagation supplies, organics, CO2 supplies, Grodan rockwool, and systems. |
| General Hydroponics: Major manufacturer of hydroponic equipment, supplies and nutrients, distributed through dealers worldwide. |
| Green Wonder Gardening Inc.: Provides hydroponic, greenhouse and outdoor growing systems, equipment and supplies, for the commercial or hobby grower. Nova Scotia. |
| Greentrees Hydroponics: Specializes in grow lights, indoor gardening and hydroponic supplies for the home grower. |
| Grodan - Hydroponics: Manufacturer of hydroponic substrates, services and consultancy to the global horticultural growing industry for protected crops. |
| Hydroasis: Full-service hydroponic and organic gardening. Specialize in indoor lighting, hydroponic systems, quality nutrients, and organics for hobby and commercial growers. Secure online ordering, ships everywhere. |
| Hydrofarm: Major manufacturer of hydroponic systems, supplies and high-intensity halide, sodium, and fluorescent plant grow lights for indoor gardening. |
| Hydroponic Connection: Provides hydroponic equipment, nutrients, and fertilizers. Product information and order form. Victoria, Australia. |
| Hydroponic Merchants Association: Founded to promote the future of the hydroponic equipment industry. International directory of members, lists of hydroponic and indoor garden equipment merchants. |
| Hydroshop: An Australian based hydroponic retailer and plant lighting specialist. Online catalog, tips and ordering. |
| Hydroton Expanded Clay Media: A site providing information about Hydroton expanded clay pellets, one of the more popular hydroponic medias in use. The clay pellets are available in various sizes for use in hydroculture. |
| Kit Masters Hydroponics: Hydroponics lab kits and supplies. |
| Pinecrest Investment Group, Inc.: Pinecrest Investment Group and Pinecrest Farms develop new techniques and technologies in hydroponic greenhouse herbs and lettuce farming. |
| QuickGrow Systems Ltd: Supplying hydroponics kits and supplies. British Columbia. |
| Superior Growers Supply: Indoor gardening center offering the latest European technology specializing in hydroponics and horticultural lighting. |
| The Hydromall: Searchable database contains over 500 hydroponic store listings worldwide, as well as an abundance of articles and links. |
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