Mulching is one of the best things you can do for the health of your trees—but only if it’s done correctly. Improper mulching can lead to disease, pest issues, and poor growth. Done right, it helps retain soil moisture, regulate temperature, suppress weeds, and improve soil quality.
Start by choosing the right mulch. Organic materials like shredded bark, wood chips, or pine needles are ideal. These break down over time, adding nutrients to the soil.
Next, clear the area around the base of the tree. Remove grass and weeds in a 3- to 5-foot radius (more for larger trees). Apply a 2- to 4-inch layer of mulch over this cleared area. More than 4 inches can suffocate roots and promote fungal growth.
Most importantly, don’t pile mulch against the trunk. This common mistake, often called “volcano mulching,” traps moisture against the bark, inviting rot and pests. Instead, pull the mulch a few inches away from the trunk, creating a “doughnut” shape rather than a “mountain.”
Replenish mulch as needed—typically once a year in spring or fall. Avoid refreshing too frequently, which can lead to a buildup of excess mulch.
Proper mulching is simple but powerful. By following these steps, you’ll support strong, healthy trees and enhance your landscape for years to come.
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