3. Apply Mulch Correctly

Proper mulch application is crucial for promoting tree health and preventing common issues like root rot or fungal growth. Here’s how to apply mulch effectively:

• Determine the Ideal Thickness: Aim for a mulch layer that’s around 2-4 inches deep. A layer this thickness will retain moisture and block weeds while allowing air and nutrients to penetrate the soil.
• Leave Space Around the Tree Trunk: Never pile mulch directly against the trunk, as this can trap moisture and create a perfect environment for rot, pests, and disease. Instead, leave a 3-6 inch gap between the mulch and the trunk to allow for air circulation.
• Create a Mulch Ring: Spread the mulch in a ring around the tree that extends to the drip line, where the outer branches end. This covers the area where most of the tree’s feeder roots are located, maximizing nutrient absorption and protection.

4. Refresh Mulch Annually

Mulch breaks down over time, especially organic mulch, which decomposes naturally and integrates into the soil. Refreshing mulch each year helps maintain the right thickness and provides a steady supply of nutrients. Here’s how to keep it up:

• Remove Old Mulch if Necessary: If you notice an excessive buildup of mulch (more than 4 inches), it’s best to remove some of the old layers before adding new mulch. Over-mulching, or creating a “mulch volcano,” can suffocate tree roots and trap excess moisture.
• Inspect for Fungus or Mold: Organic mulch can sometimes develop mold or fungal growth if it’s overly damp. This is usually not harmful, but if it’s extensive, consider raking or lightly fluffing the mulch to improve air circulation before adding new mulch.