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Hydroponic Society of America
Non-profit organization dedicated to the exchange of information in the field of hydroponics. Members include educators, researchers, vendors, commercial growers and hobbyists.
http://www.hydroponics.org/
Hydroponics Growing Systems
Offers general hydroponics information including setup and supply of growing systems, hydroponics kits, indoor gardening, and grow lights.
http://www.hydroponics-growing-systems.com/
Hydroponics Resource for Inexpensive Startups
Secrets for starting hydroponic businesses. Includes information about hydroponic nutrients, maintenance, production, greenhouses, and marketing.
http://www.mayhillpress.com
Institute for Simplified Hydroponics
Dedicated to supporting efforts to use simplified hydroponics to reduce global hunger and poverty. Offers classes and activities to support the education of simplified hydroponics, especially in developing nations.
http://www.carbon.org
The Growing Edge
A bimonthly magazine dedicated to hydroponics, aquaponics, and greenhouse growing. Provides a wealth of free information for soilless growers.
http://www.growingedge.com
