Hydroponics Merchants Assoc
Description: The Hydroponic Merchants Association (HMA) was founded in June 1997, as an international body to meet the needs of retail, manufacturing, wholesale and other commercial interests in the hydroponic industry.
HydroponicSearch.com
Description: Hydroponics search engine, educational resources, forum, auction, and more.
Maximum Yield magazine
Description: Hydroponics and Indoor Gardening info, articles and online directory.
