Co-op produce manager says now is a good time to experiment with different lettuces. Written By: Holly Ebel | × People's Food Co-op in downtown Rochester offers a wide variety of greens. (Ken Klotzbach / kklotzbach@postbulletin.com) With snow on the ground and temps below freezing, it seems a little odd to focus on greens. On the other hand, dietitians emphasize the importance of greens in our diet, particularly since they are chock-full of vitamins and antioxidants. With that in mind, I decided to see which greens were available midwinter in Rochester. That took me to People's Food Co-op downtown, and what a surprise! The variety on display appeared as fresh and vibrant as you see midsummer at the farmers market.