Problems & fixes

Holes, molds and other surprises in mulch beds — what they are and what to do.

• What Is Making Holes in My Mulch?Problems & fixes

  Small holes in your mulch bed? Identify the culprit by hole size: earthworms, bees, cicada killers, voles, chipmunks, squirrels or skunks, and what to do.

• White (or Yellow) Stuff in Your Mulch: What It IsProblems & fixes

  Found white, yellow or foamy stuff in your mulch? Slime mold, bird's nest fungi, artillery fungus and mushrooms explained, with what to do, per UMass Extension.

• How to Use Mulch to Prevent WeedsProblems & fixes

  Does mulch stop weeds? It suppresses annual weeds by blocking light at 2-4 inches; perennial weeds must be removed first. Depth, fabric and upkeep explained.

See all guides.