'Tis the Season
Even if you don't have the space -- or energy -- for gardening, you can take advantage of seasonal abundance and low prices with an age-old practice: canning. It's labor intensive, but it's not hard. Your county cooperative extension agency should have how-to information, or you can take a free self-study course online through the National Center for Home Food Preservation. There's a low initial investment for equipment and jars, but since almost everything is reusable (lid inserts aren't), it's sustainably cheap and green, too.