- CropKing, Inc.
 - With information for commercial hydroponic users as well as hobbyists. - General Hydroponics
- Manufacturer of hydroponic gardening and greenhouse equipment and fertilizers.
- Bloomington Wholesale Garden Supply
- Offers hydroponic and organic gardening supplies.
- Green Air Products
- Manufactures a line of horticultural, atmospheric and nutrient control systems for both the hobbyist and the small-scale greenhouse grower.
- Hydrofarm, Inc.
- Maker of hydroponics gardens, growlights, and software for enthusiasts and commercial growers.
- Canadian Wholesale Hydroponics
- Offers wholesale hydroponic supplies and equipment including grow lights, nutrients, complete indoor growing systems, and an online gardening forum.
- Life Circle Hydroponics
- Sells kits, supplies, and parts including medium, lights and bulbs, seeds, as well as technical assistance and testing.
- Allie's Wholesale Garden Supply
- Hydroponics and fertilizer development.
- Kit Masters
- Manufacturer and supplier of pipe clips, greenhouses, rain shelters, hydroponics kits, and accessories.
- Autogrow Systems
- Manufacturer of hydroponic and greenhouse automation equipment.
 Blooms & Greens
- Hydroponics research and development company offering vegetables.
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