Composting is both art and science, and it takes skill, patience, creativity, and yet more patience to discover that maybe it's not as easy to do at home as you thought. Thank goodness for Arizona Worm Farm, which sells just about anything you could want from the compost world: compost, worms, castings, worm bins, and mulch. Unlike many other sources of compost — good luck trying to figure out when or if cities like Tempe and Phoenix are randomly offering free compost — the Arizona Worm Farm has a permanent location with regular hours. It sells its own compost, as well as compost from the city of Phoenix, which provides essential nutrients to plants and flowers that can take the place of commercial, chemical fertilizers. The Worm Farm offers a variety of sizes — you don't have to buy in bulk unless you need to — negating the need for any future trips to Home Depot to get Miracle-Gro.