Transitioning to Mulch
Q: We currently have pine straw as a ground cover. We are going to replace that with mulch. Do we need to remove the pine straw or can we place the mulch directly over the pine straw?
A: One of the greatest benefits of mulch is its contribution of organic matter to the soil beneath. The pine straw that you have now will eventually decompose, but I know it’s a slow process. There’s no reason to remove it. The mulch on top will press the pine straw closer to the earth where moisture and insects can more readily break it down. Eventually, your beautiful mulch on top will begin to break down as well. You’ll have to replenish it with fresh mulch. I think organic mulch is the best thing for trees and shrubs in the landscape. The constant addition of organic matter feeds microorganisms, makes the soil hold water, and allows pore space to form. That’s why I’m not often in favor of using rocks, slate chips, or marble chips for mulch.
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