The Boston Natural Areas Network and the Mattapan Branch Library will present a free workshop on Saturday, September 27 from 10 – noon at the Mattapan Branch Library, 1350 Blue Hill Avenue in Mattapan. Complete the growing season by saving seeds from your most productive plants. During this final workshop in the Celebrating Seeds series, discuss when and how to collect seeds, methods of processing and proper storage conditions. Registration required, to register call 617-542-7696 or email info@bostonnatural.org.