Community-supported agriculture, commonly referred to as a CSA model, is a system that connects the producer and consumers within the food system more closely by allowing the consumer to subscribe to a the harvest of a certain farm or group of farms. It is an alternative, socioeconomic model of agriculture and food distribution that allows the producer and consumer to share the risks of farming. The model is a subcategory of civic agriculture that has an over arching goal of strengthening a sense of community through local markets.
In return for subscribing to a harvest, subscribers receive either a weekly or bi-weekly box of produce or other farm goods. This includes in-season fruits and vegetables and can expand to dried goods, eggs, milk, meat, etc. Typically, farmers try to caress a relationship with it's subscribers by sending weekly letters of what is happening on the farm, inviting them for harvest, or holding an open-farm event. Some CSAs provide for contributions of labor in lieu of a portion of subscription costs.
The term CSA is mostly used in the U.S. and Canada, but a variety of similar production and economic sub-systems are in use worldwide.
The term "community-supported agriculture" was coined in the northeastern United States in the 1980s, influenced by European biodynamic agriculture ideas formulated by Rudolf Steiner. Two European farmers, Jan Vander Tuin from Switzerland and Trauger Groh from Germany, brought European biodynamic farming ideas to the United States in the mid-1980s. Vander Tuin had co-founded a community-supported agricultural project named Topinambur located near Zurich, Switzerland. Coinage of the term "community-supported agriculture" stems from Vander Tuin. This influence led to the separate and simultaneous creation of two CSAs in 1986. The CSA Garden at Great Barrington was created in Massachusetts by Jan Vander Tuin, Susan Witt, and Robyn Van En. The Temple-Wilton Community Farm was created in New Hampshire by Anthony Graham, Trauger Groh, and Lincoln Geiger.
The CSA Garden at Great Barrington remained together until 1990 when many members left to form the Mahaiwe Harvest CSA. One of the original founders, Robyn Van En, became incredibly influential in the CSA movement in America and founded CSA North America in 1992. The Temple-Wilton Community Garden was more successful and still operates as a CSA today. It became an important member of the Wilton community and it receives funding from state, federal, and local sources.