A compost pile can be started in sun or shade at any time of the year. Good ingredients include leaves, hay, grass clippings, tree trimmings, food scraps, bark, sawdust, rice hulls, weeds, nut hulls and animal manure. Mix the ingredients together in a container of wood, hay bales, hog wire, concrete blocks or simply pile the material on the ground. The best mixture is 75-80% vegetative matter and 20-25% animal waste, although any mix will compost. The ingredients should be a mix of coarse and fine-textured material. Avoid having all the pieces of material the same size since the variety of sizes will help air to move through the pile. Oxygen is a critical ingredient. Turn the pile at least once a month; more often speeds up the process. Keep the pile moist, roughly the moisture of a squeezed-out sponge, to help the living microorganisms thrive and work their magic. Compost is ready to use when the ingredients are no longer identifiable. The color will be dark brown, the texture soft and crumbly and the aroma that of a forest floor. Use compost in all bed preparation and as a high quality mulch around annuals and perennials.