Why Trees Love Mulch (And How to Do It Right This Spring)

Mulch isn’t just a pretty finishing touch—it’s one of the best things you can do for your trees. It acts like a natural blanket, helping trees hold onto moisture, regulate temperature, and reduce competition from weeds. It also prevents erosion, protects roots from lawnmower damage, and improves soil structure over time.

But for mulch to work, it needs to be applied properly. Here’s what every homeowner should know:

1. Use the Right Mulch: Organic mulch is best. Shredded bark, aged wood chips, or composted leaves all break down slowly, enriching the soil with nutrients. Avoid dyed mulch (it can contain chemicals) or rubber mulch, which doesn’t improve soil quality.

2. Aim for a 2–4 Inch Layer: A thin layer won’t provide enough protection, while anything over 4 inches can suffocate your tree’s roots and invite fungi or pests. Two to four inches is the sweet spot.

3. Keep Mulch Away from the Trunk: Never let mulch touch the base of the trunk. It holds in moisture and invites rot, insects, and even rodents. Keep a clear, donut-shaped ring around the trunk, about 3–6 inches wide.

4. Mulch the Right Area: Try to cover the root zone, which often extends out as far as the branches (the drip line). Even if you can’t mulch the full area, more is better than less.

5. Refresh It Seasonally: Mulch breaks down over time. In spring, rake away old mulch, break up compacted areas, and top it off with a fresh layer to keep things breathable and clean.

6. Watch for Mulch Buildup: If your mulch starts looking matted or moldy, it may be too compacted. Use a rake or cultivator to fluff it up and allow for better air and water flow.

Mulching is a simple habit that makes a big impact. Not only will your trees look better—they’ll be stronger, healthier, and more resilient against summer heat and storms.

Why Trees Love Mulch (And How to Do It Right This Spring)