John,
BNAN, Boston Natural Area Network has a great program of working with immigrant and refugee families to establish community gardens. Creating a
project under another community non-profit is easily done and could be a ringer to getting
local zoning in your favor, plus there would be awesome growing knowledge with an immigrant community. Just a thought..
Check their site out which has a ton of resources:
http://www.bostonnatural.org/cgGRO.htm