While an even layer of mulch is ideal, don't overdo it. The best depth for a mulch layer is 2-4 inches. Any deeper, and it can be difficult for oxygen to reach the soil, which can cause your plants to ...
To mulch is to cover the soil with two objectives in mind: increasing the moisture retention of your soil and keeping the weeds at a minimum. As far as those two objectives go, no mulch works better ...
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