Hello, I am new to gardening and would like to start a compost bin. I would like a wooden one and was considering building one from untreated scaffolding planks (I know this will rot eventually but worry about toxins leaking into my compost and then into my veggies) or should I go for a plastic bin? All the wooden ones online seem to be made from treated timber...Any advice gratefully received, thank you!
One more thing, how do I know what size of bin I will need? Thank you!