What a cool idea! I was just this morning thinking about this after reading an Edmonton FullCircles offer to pick unharvested rasberries.

Here in New Westminster we have an organization called "The Biggest Little Garden" They supply the planting boxes soil seed tools everything you need for a little garden. All they ask is that you pass on the veg you don't need for yourself. There are also garden plots around where you have your own little patch of a larger garden to take care of and at the end of the season you share the produce.