A CSA is a group of people that have been paired up with a regional farmer to receive a share of that farmer's crop. The farmer sells shares in their farm's upcoming season to individuals, families, or groups. The share price goes toward the cost of growing and distributing a season’s worth of produce and paying the farmer a living wage.
Each week of the CSA season (usually from June through November) the farmer delivers the week’s share to a central distribution site. Members collect their food at their neighborhood sites. Typically, each week’s share provides between seven and ten types of fruits and vegetables, enough for a family of two to three people. Over the course of a season members get at least forty different types of crops, usually organic, always fresh-picked and changing with the seasons.
For those in the New York area and New England, membership season is just kicking into high gear.
There are CSAs all over the city and Just Food is a great resource for finding one in your neighborhood. For listings in other cities, try a google search for "CSA" or "Community Supported Agriculture" and the name of your town.