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. 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. Hydroponics Project - Photographic presentation of hydroponics project at Colorado State University. 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 Hydroponics Online School - Provides a course on hydroponic cultivation. Hydroponic-Gardens - Provides information and instructions on building and using a hydroponic system. Monthly newsletter avalable. History of Hydroponics - Article following the history of growing plants without soil from the hanging gardens of Babylon in 600 BC to the present day. Hydroponic Economics - A blog focused on hydroponics and building efficient home hydroponic systems. Hydroponics Source - Offers information on hydroponics systems and growing techniques.. The Cocoponics Community - Technical blog sharing the author's experiences of hydroponics and the materials collected over a period of time.