SussexCarole is spot on. Urine is the best compost activator there is, and it's free. Urine is rich in nitrogen and potassium, and healthy urine is sterile. Lawrence D. Hills, the pioneering organic gardener, called urine "liquid household activator." So, take a trip to the compost heap when needs must, with just a furtive backward glance, and improve the fertility of the garden, and save water at the same time. Everyone's a winner.