Mulching can be beneficial for tree health as it helps retain moisture and improve soil conditions. However, incorrect mulching practices can harm trees, even causing their death.

One common mistake is called “volcano mulching,” where excessive mulch is piled around the base of trees, creating a volcano-like shape against the trunk. Mulch should not come into direct contact with the tree trunk. Doing so can result in improper root growth, decay, and infestation. By following a few simple practices, we can promote the health of local trees:

• Spread mulch away from the tree base, exposing the trunk/root flare.
• Use a recommended mulching depth of 2 to 4 inches.
• Extend mulch in a 4- to 5-foot diameter away from the tree.
• Check mulch levels annually; trees may not need mulching every year.
• Ensure mulch is not piled against the tree bark by landscapers.