The Mulch Volcano Mistake
At Jensen Gardens, we believe in cultivating healthy landscapes, and that includes proper mulching techniques. But not all mulching is created equal! One common landscaping mistake we see time and time again is the dreaded "mulch volcano." While this practice might seem harmless—or even visually appealing—it can actually cause serious harm to your trees and plants over time. Here's what you need to know about this risky trend and why it's best to avoid it.
What Are Mulch Volcanoes?
A mulch volcano occurs when mulch is piled high around the base of a tree, creating a cone-shaped mound. Though this may seem like an effective way to protect a tree, it can trap excess moisture against the trunk, lead to improper root growth, and ultimately weaken the tree.
Risks of Mulch Volcanoes
Excess Moisture Retention: Mulch volcanoes keep moisture pressed directly against the tree trunk. This can cause the bark to rot, weaken, and invite diseases or pests to take hold.
Encourages Shallow Roots: When mulch is too thick or improperly placed, tree roots may grow abnormally close to the surface, leading to instability and poor nutrient absorption.
Suffocation Risk: Thick layers of mulch can prevent oxygen from reaching the tree’s root system, essential for its health and longevity.
The Correct Way to Mulch
Instead of piling mulch like a volcano, aim for a “donut” shape around the tree's base. Here are some quick tips to follow for proper mulching:
Spread mulch evenly in a ring, keeping it 2–4 inches deep.
Leave a 2–3 inch space around the trunk, keeping mulch away from direct contact with the bark.
Expand the ring outward to cover the tree’s critical root zone (roughly the diameter of the tree’s canopy).
Why Proper Mulching Matters
A well-mulched tree is a happy tree! Proper mulching helps to conserve soil moisture, regulate temperature, control weeds, and improve overall soil health. By steering clear of mulch volcanoes, you’re ensuring your trees thrive while boosting the aesthetics and value of your landscape.
At Jensen Gardens, we’re passionate about creating healthy, vibrant yards. Avoiding small mistakes like mulch volcanoes can make a big difference in your garden’s success. If you're not sure whether your mulching methods are working as intended, we’re here to help!
Contact us today and let our team of experts help care for your yard. Together, we’ll cultivate the beauty and health of your outdoor space for many seasons to come.