| Crop Physiology Laboratory - Hydroponics: Excellent source of information for recirculating hydroponics methodology from Utah State University. |
| Growing Hydroponic Tomatoes: Interactive web site from the University of Arizona provides practical, accurate information on growing hydroponic tomatoes for students, hobbyists, and beginning growers. |
| History of Hydroponics: Gary V. Deutschmann covers the history and future of hydroponic gardening. |
| Home Hydroponics: An excellent introduction to the hydroponic methodology from the Virginia Cooperative Extension. |
| How To Produce Green Fodder Hydroponically: Book on small scale cultivation of green fodder via the hydroponic method. Website in Spanish and English. |
| Hydroponic Lettuce Production: Details of setting up and running a lettuce production facility using Controlled Environment Agriculture techniques. Illustrated with descriptive photos. Cornell University. |
| Hydroponics as a Hobby: A circular from the Extension at University of Illinois at Urbana-Champaign, offers a basic history and guide to hobby hydroponics. |
| Hydroponics Project: Photographic presentation of hydroponics project at Colorado State University. |
| Hydroponics Resource for Inexpensive Startups: Secrets for starting hydroponic businesses. Includes information about hydroponic nutrients, maintenance, production, greenhouses, and marketing. |
| 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. |
| Production of CEA-grown Hydroponic Spinach: Publication by the Controlled Environment Agricultural (CEA) Program of the College of Agriculture and Life Sciences at Cornell University. An electronic handbook for the production of CEA hydroponic spinach. |
| Role of Perlite in Hydroponic Culture: A research report issued by the Perlite Institute, Inc. by Dr. David A. Hall, Principal of the Pershore College of Horiculture in the United Kingdom |
| The Growing Edge: A bimonthly magazine dedicated to hydroponics, aquaponics, and greenhouse growing. Provides a wealth of free information for soilless growers. |
| Vitaran HC: Software for calculating nutrition formulations in hydroponic applications. Both site and software in Spanish and English. |
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