- Pipe Dreams Hydroponics
 - Includes bulletin board, picture index, and more. - BetterGrow Hydro
- Specialising in hydroponics, organics, and indoor growing. Selling lighting and growing systems, nutrients, enhancers, pest control, and atmospheric controls.
- CropKing, Inc.
- With information for commercial hydroponic users as well as hobbyists.
- Growco Indoor Garden Supply
- Offers hydroponics systems, and supplies, high intensity indoor lighting, and nutrients.
- Hydroasis
- Specialising in hydroponics, HID lighting, indoor gardening systems, Canna nutrients, and pest and environmental control products.
- TCS Hydroponics
- Specialises in indoor gardening, with a line of grow lights, hydroponic systems, supplies, organic fertilizer, natural pest control, and more.
- Plant It Earth
- Specialises in indoor gardening, selling a complete line of grow lights, hydroponic systems and supplies, organic soils and amendments, and natural pest control.
- Superior Growers Supply
- Sells indoor lighting and systems to grow plants indoors with or without sunlight.
- ACI Hydroponics
- Manufacturer of hydroponic gardens and indoor gardening equipment. Designed for home hobby educational and commercial applications.
- Garden Indoors
- Hydroponic systems, containers, grow lights, nutrients, growing mediums, seed starts, and more for garden and greenhouse needs.
- Granite Hydroponics
- Offers hydroponic gardening supplies for hobby and commercial growers.
- Sea of Green
- Equipment and accessories.
- Grow Room, The
- Specialising in hydroponics, HID lighting, nutrients, indoor grows systems, environmental controls and greenhouse design.
- Harvest Moon Hydroponics
- Specialising in hydroponics, greenhouses, artifical lighting, biodiversity, and new plant varieties. Also, specialising in fertilizer, environmental controls, and indoor gardening.
- Mayfield Press
- Offers several books on hydroponics.
- Pyraponic Industries
- Sells Phototron, an indoor growing system.
- Greentrees Hydroponics
- Information for beginners and experts; products and grow lights for the home grower.
- HydroponicStore.com
- Distributor of hydroponic systems, organic nutrients, HID lighting and more.
- American Hydroponics
- Manufactures and sells hydroponic gardening supplies for hobby and commercial growers worldwide, with an emphasis on promoting clean water and recycling resources.
- Home Harvest Garden Supply
- Online ordering for hydroponic, greenhouse, irrigation, nursery, and organic growing supplies.
- Seed and Grain Technologies
- Sprouting systems.
- GroWell Hydroponics & Plant Lighting Ltd.
- Offers hydroponics equipment, lights, and grow kits.
- Eco Enterprises
- Supplier of hydroponic nutrients and supplies, and aquaculture products.
- CareFree Garden
- Offers equipment, training, and supplies for growing plants with hydroponics.
- Atlantis Hydroponics
- Suppliers of hydroponic equipment, nutrients, accessories, complete systems, and lighting.
- Pinecrest Investment Group, Inc.
- Greenhouse grower of hydroponic herbs and lettuces. Specialises in basil, spring mix, lettuces, rosemary, and other herbs.
- Harvest Moon Gardening and Hydroponics
- Offers UV resistant growing trays and horticultural lighting.
- Esoteric Hydroponics
- Offers hydroponics equipment, grow lights, and accessories.
- PlantLighting.com
- Sells hydroponic metal halide and high pressure sodium grow lights, soilless organic growing systems, plant nutrients, HID grow lamps, and more.
- FutureGarden
- Lights, supplies, automated garden equipment, and more.
- Hydro-Tech Hydroponics
- Supplies and information.
- Rambridge Wholesale Supply
- Wholesale manufacturer and distributor of hydroponics supplies.
- Alternative Garden Supply, Inc.
- Hydroponic and indoor gardening products.
- Grow Store
- Offers lights, growing systems, nutrients, and more.
- 77Hydro.com
- Selling nutrients, electronics, HID grow lights, hydroponic systems, and accessories, books, videos, and more.
- Airline Hydroponics
- Offering lighting supplies, hydroponic systems, greenhouses, and more.
- Cultivation Station, The
- Offers indoor and outdoor gardening supplies. Also specialises in hydroponic growing products.
- Indoor Garden and Lighting
- Solutions for hydroponics.
- Light Manufacturing Company
- Products include grow lights, hydroponic systems, and plant nutrients.
- MicroFarm
- Product and ordering information for hydroponic planters.
- InterUrban WaterFarms Online
- Home Growing Automated Systems
- Products include hydroponics, greenhouses, grow room equipment, grow lights, mediums, nutrients, and more.
- Greenlite Windsor
- Supplying mediums, light systems, pH meters, and more.
- B.C. Hydroponics
- Offers lighting, hydroponic nutrients, systems and irrigation products.
- Growking.com
- Indoor growing accessories available; complete GrowKits, lighting, bulbs, etc.
- Green Thumb Lighting & Garden Supply
- Specialises in indoor growing needs.
- North American Hydroponics
- Builders of homegrown hydroponics equipment.
- Interior Gardens Incorporated
- Offers hydroponic gardening supplies including grow systems, lighting, and nutrients as well as seeds and outdoor garden supplies.
- Jon's Plant Factory
- Offer products and techniques for hobbyists and pros.
- Canadian Wholesale Hydroponics
- Offers wholesale hydroponic supplies and equipment including grow lights, nutrients, complete indoor growing systems, and an online gardening forum.
- Hydroponic Warehouse, The
- Features information about all facets of hydroponic gardening. Products include lights, nutrients, hydroponic kits, grow systems, irrigation, and test kits.
- Life Circle Hydroponics
- Sells kits, supplies, and parts including medium, lights and bulbs, seeds, as well as technical assistance and testing.
- R & D Aquaponics
- Providing hydroponics and aquaponics equipment and advice for home and commercial growers.
- Casper Publications
- Bi-monthly magazine dedicated to hydroponic/soil-less culture and protected cropping techniques.
- Nielsen Enterprises
- Sells reflective film used as mirror sheeting for hydroponics, as well as arts and crafts.
- Kahala Hydroponics
- Offers a Hawaiian Ti plant kit.
- Urban Organics
- Full-service retailer for hydroponic and organic gardening supplies including grow lights.
- Rêves et Jardins
- Offers indoor, outdoor, and hydroponic plants and garden supplies.
- GroSystems, Inc.
- Manufacturer and supplier of Aquanutrient hydroponic growing units for use by the commercial grower and home gardener in the greenhouse and outdoors.
- Hollister's Hydroponics
- Mail order supplier of hydroponic gardening products.
- Hydroponics Shop
- Online hydroponics shop offering a wide selection of indoor plant lighting, hydroponic grow systems, hydro and organic horticultural supplies, and other grow-room equipment and indoor gardening accessories.
- Super LEDs
- Features high power LED grow lights.
- Urban Farming Source Book
- retailer offers garden and beer making supplies. Includes hydroponics, organics, grow lights, natural pest control, and home brewing equipment.
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