Should I Mulch Around Mature Trees?
Mulching around mature trees often makes sense when it is done correctly: a thin, wide ring of organic mulch can suppress weeds, conserve moisture, moderate soil temperature, and protect roots from equipment damage. It may not be advisable if mulch is piled against the trunk, drainage is poor, the tree is stressed or diseased, or local fire risk is high. Before deciding, assess drainage, the existing root collar, available maintenance effort, and the tree species and climate.