That is dependent on when you intend to use it; if you intend to use it soon, turn frequently. On the other hand, if you have plenty of time, don't worry about turning it as frequently; 6 to 12 weeks is the minimum need, but you can turn it as frequently as you need to. When selecting when to flip your pile, you should also consider the heat, temperature, and other elements. You might also use one of our recommendations for the best composting grinders.