There are hundreds of gardens on New York City Housing Authority (NYCHA) campuses. With only a few exceptions, NYCHA land is reserved for gardening by NYCHA residents; gardening on NYCHA property by NYCHA residents is supported by the NYCHA Garden and Greening Program. If you have friends or family who reside in a NYCHA campus, you can also work with Garden and Greening. You need to get permission from the management company of a particular campus and find out what they need from neighbors to get started. Then, work with your friends and family to organize a group of NYCHA residents.
There are other situations where non-profit organizations have teamed up with NYCHA to utilize their land. The Red Hook West Urban Farm in Red Hook, Brooklyn is a collaboration between the Red Hook Houses' management, Green City Force, and the organization Added Value.
Some NYCHA land is not connected to campuses. For example, the NYCHA-owned property on Berry Street at South 11th Street in Williamsburg, Brooklyn is stewarded by tenants from the NYCHA campus nearby and the lofts across the street from the lot. Folks from the lofts particpate in gardening as "guests" of the NYCHA residents.