You should compost because it is good for your soil. One of the most important components for improving soil fertility is organic matter. Organic matter improves soil structure as well as water and fertiliser efficiency, ultimately leading to healthier plant growth....
Compost itself is not a growing medium, but a soil conditioner or soil amendment. It is organically rich but more of a good thing is not necessarily better. Using excessive amounts can create too much warmth for the plant roots and may not provide adequate drainage....