06/29/2026
🌳 The Truth About Mulch: One of the Most Overlooked Parts of a Healthy Landscape
When people think about keeping their landscape healthy, they usually think about watering, fertilizing, or pruning. While those are all important, one of the most valuable things you can do for a tree or shrub is also one of the simplest: applying mulch correctly.
Done properly, mulch creates a healthier environment for the entire root system. Done incorrectly, it can contribute to stress, disease, insect problems, and even the slow decline of a tree over time.
Let’s break down why.
🌱 The majority of a tree’s roots aren’t deep.
Many people picture tree roots growing straight down like a giant carrot. In reality, most of a tree’s absorbing roots are found in the top 6 to 12 inches of soil. These fine roots are responsible for taking up nearly all the water and nutrients the tree needs.
Because they’re so close to the surface, they’re greatly affected by:
• Summer heat
• Drying winds
• Soil compaction
• Lawn equipment
• W**d competition
That’s where mulch becomes incredibly valuable.
☀️ Mulch acts like insulation.
Bare soil can become extremely hot under the Texas sun. A 2 to 4 inch layer of organic mulch helps:
✔ Moderate soil temperatures
✔ Reduce temperature fluctuations between day and night
✔ Protect surface roots from extreme heat
✔ Reduce moisture loss through evaporation
The result is a more stable environment where roots can continue functioning efficiently during stressful summer weather.
💧 Mulch improves water efficiency.
Every time the sun beats down on bare soil, moisture is lost through evaporation.
Mulch dramatically slows this process by shading the soil surface, allowing water to soak in and remain available to roots much longer.
🌿 Healthy soil is alive.
A handful of healthy soil contains billions of bacteria, beneficial fungi, microscopic organisms, insects, and earthworms.
These organisms:
• Break down organic matter.
• Improve soil structure.
• Increase nutrient availability.
• Create natural channels that improve water infiltration and oxygen movement.
Organic mulches like hardwood, pine bark, cedar, and arborist wood chips slowly decompose, feeding this underground ecosystem year after year.
🪵 Trees evolved to grow in forests, not lawns.
Walk through a healthy forest.
You won’t find bare dirt beneath mature trees.
You’ll find leaves, bark, twigs, and decomposing organic matter covering the ground. Nature has been mulching trees for millions of years. Applying mulch simply recreates the environment trees evolved to grow in.
🚜 Mulch also protects against one of the biggest causes of tree damage: lawn equipment.
Repeated contact from string trimmers and lawn mowers damages bark and exposes the living tissue beneath. Even small wounds can interrupt water and nutrient flow while creating entry points for insects and disease.
A wide mulch ring keeps equipment away from the trunk and dramatically reduces this risk.
🌋 Avoid the “mulch volcano.”
Piling mulch against the trunk doesn’t help the tree. It can actually:
❌ Hold excess moisture against the bark
❌ Encourage rot and fungal diseases
❌ Attract insects
❌ Hide the root flare
❌ Promote girdling roots that can slowly choke the tree
The proper shape is a wide, flat donut, not a volcano.
📏 The right way to mulch:
• Apply 2 to 4 inches of organic mulch.
• Keep mulch 3 to 6 inches away from the trunk.
• Leave the root flare visible.
• Extend the mulch ring as wide as practical rather than piling it deeper.
🪨 What about decorative rock?
Rock certainly has its place in landscaping, but it also has drawbacks.
Unlike organic mulch, rock absorbs heat all day and slowly releases it back into the soil well into the evening. During our Southeast Texas summers, that can increase root-zone temperatures and dry the soil more quickly.
Organic mulch helps cool the soil, conserves moisture, feeds beneficial organisms, and improves soil health over time. Rock does none of those things.
🌳 Healthy landscapes don’t start above ground. They start below the surface with healthy soil and healthy roots.
Taking the time to mulch correctly today can lead to stronger trees, healthier shrubs, fewer w**ds, less watering, and a landscape that thrives for years to come.
📞 Need fresh mulch, new landscape beds, tree rings, bed maintenance, or a complete landscape refresh? Call Tatum Landworks today at (409) 270-4935 for a free estimate. Let us help your landscape beat the Texas heat!
