The 2013 UMass Garden Calendar gives us inspiration and education as this season closes down, and we gardeners are already thinking about a new growing season. For many years , UMass Extension has worked with the citizens of Massachusetts to help them make sound choices about growing, planting, and maintaining plants in their landscapes, including vegetables, backyard fruits, and ornamental plants. Our 2013 garden calendar continues UMass Extension's tradition of providing gardeners with useful information. This year's calendar includes tips…