Learning Center · How-To & Care

How Deep Should Mulch Be?

Too thin and mulch does nothing; too thick and it smothers plants and holds water against stems. Here's how to get the depth right and avoid the classic 'mulch volcano' mistake.

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Why depth matters

Suppressing weeds and holding moisture
Letting roots breathe
Avoiding rot against stems and trunks

The mulch volcano mistake

Why piling mulch on trunks harms trees
Keeping mulch off stems

Refreshing vs. re-mulching

Topping up existing mulch
When to remove old, matted mulch

The Bottom Line

We install mulch at the right depth for healthy beds. Free estimates at (203) 731-1694.

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