I have read that it is best to layer different materials within a compost heap. Is this correct?

The logic behind this idea is to ensure that there is a good mixture of ingredients within the heap. However, layering is not as good as mixing. A solid layer of grass cuttings can suffocate your heap. Instead ensure grass is mixed in with BROWNS, such as fine woody waste or screwed up paper and card (remember flat pieces of paper/card will prevent air from circulating). By mixing all of the ingredients before they go into the compost bin, you can ensure that there are air pockets evenly distributed throughout the heap.

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