PurLec Hydroculture
- Offers a range of potting products, instruments, and nutrients for business and residential interior plantscapes. Canada.
- http://www.purlec.ca

Carlin Sales Corporation
- Supplies for greenhouses, nurseries, lawns and gardens, and landscapers. Additional services include greenhouse construction and pre-filled containers.
- http://www.carlinsales.com

Hummert International
- Hummert International is a commercial distributor of horticultural supplies and equipment. Fertilizers, chemical applicators, greenhouses, HVAC equipment, lawn and garden supplies, soil conditioners.
- http://www.hummert.com

American Horticultural Supply, Inc.
- Wholesale distributor of hard goods for the green industry.
- http://www.americanhort.com

Hydroponics Online
- Hydroponics tutorials, forums, and garden designs. Includes photos and grower bulletin boards.
- http://www.hydroponicsonline.com/

Homegrown Hydroponics
- Hydroponic equipment, nutrients, lights, and grow info. for beginners and experts.
- http://www.hydroponics.com/

77HYDRO
- An indoor garden site specializing in hydroponics. Offers questions and answers on hydroponics and indoor garden lights, as well as product information.
- http://www.77hydrostore.com

QuickGrow Systems Ltd
- Supplying hydroponics kits and supplies. British Columbia.
- http://www.quickgrow.ca

Grodan - Hydroponics
- Manufacturer of hydroponic substrates, services and consultancy to the global horticultural growing industry for protected crops.
- http://www.grodan.com

The Hydromall
- Searchable database contains over 500 hydroponic store listings worldwide, as well as an abundance of articles and links.
- http://www.hydromall.com/

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.
- http://hydromerchants.org

Autogrow Systems Ltd
- Manufacturers of hydroponic dosers, test equipment and controllers for greenhouse automation.
- http://www.autogrow.com

Kit Masters Hydroponics
- Hydroponics lab kits and supplies.
- http://www.kitmasters.com/hydroponics.html

Superior Growers Supply
- Indoor gardening center offering the latest European technology specializing in hydroponics and horticultural lighting.
- http://www.superiorgrowers.com

Hydroshop
- An Australian based hydroponic retailer and plant lighting specialist. Online catalog, tips and ordering.
- http://www.hydroshop.com.au

Hydrofarm
- Major manufacturer of hydroponic systems, supplies and high-intensity halide, sodium, and fluorescent plant grow lights for indoor gardening.
- http://www.hydrofarm.com

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.
- http://www.hydroasis.com

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.
- http://www.carefreegarden.com

Greentrees Hydroponics
- Grow lights, indoor gardening, and supplies for the home grower.
- http://www.hydroponics.net/

General Hydroponics
- Major manufacturer of hydroponic equipment, supplies and nutrients, distributed through dealers worldwide.
- http://www.genhydro.com

Eco Enterprises
- Eco Enterprises carries a large inventory of hydroponic nutrients, lighting systems, hydroponic systems, ph controls, C02, Organics, Rockwool growing mediums, and Propagation supplies.
- http://www.ecogrow.com

American Hydroponics
- Manufactures and retails hydroponic gardening supplies for hobby and commercial growers worldwide, with an emphasis on promoting clean water and recycling resources.
- http://www.amhydro.com

Albuquerque Hydroponics and Lighting
- Offers a large selection of hydroponic systems, supplies and indoor plant grow lights.
- http://www.ahlgrows.com