Nothing. You absolutely 100% don’t need a bin or tumbler to compost. In my opinion they just waste money and limit you on scale. Ground piles are superior. If you’re working in a compact space you’ll want some kind of walls to help you build the pile upward or it will range out sideways quite a bit. If you have plenty of space, a pile is all you need and is the easiest thing to turn.
Nothing. You absolutely 100% don’t need a bin or tumbler to compost. In my opinion they just waste money and limit you on scale. Ground piles are superior. If you’re working in a compact space you’ll want some kind of walls to help you build the pile upward or it will range out sideways quite a bit. If you have plenty of space, a pile is all you need and is the easiest thing to turn.