The Cortelyou Greenmarket is on Cortelyou Road between Argyle and Rugby roads. It's open year-round Or go to any location listed here.
In the spring of 2013, Compost for Brooklyn will reopen. In the meantime, while they're closed, they'll have some needed volunteer workdays. Their website and Facebook page will list the dates and times for workdays.
Compost for Brooklyn
Newkirk Avenue and East 8th Street
Brooklyn, New Yorkhttp://compostforbrooklyn.org/
https://www.facebook.com/compostforbrooklyn