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For which is mulching not beneficial?

Is there any of my flower bed perennials that don't particularly like mulching?
Submitted by BHGPhotoContest

It's a matter of degree. Mulch helps conserve moisture and keep out weeds. But if it's too thick, it can smother the roots or hold in too much moisture. For most flowers, a mulch layer 2 to 3 inches deep is good.

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