Mulch is one of the most cost-effective investments you can make in your landscaping. Applied correctly, it suppresses weeds, retains soil moisture, regulates temperature, and gives your beds the finished appearance that ties a yard together. Applied incorrectly, it smothers plants and creates the conditions that attract pests.
The right depth: why 3 inches is the target
Mulch depth is where most DIY applications go wrong in one direction or the other:
- Less than 2 inches: Not enough to effectively block sunlight from weed seeds. You'll pull weeds all summer.
- 2–3 inches: The effective zone. Weed suppression is good, moisture retention is high, and air still reaches the soil.
- More than 4 inches: The soil can't breathe properly. Roots are denied oxygen, and the moist, dense environment invites fungal disease and pest activity.
When applying fresh mulch to existing beds, pull back any old mulch first and measure what's there. If you already have 2 inches, adding another inch gets you to the target without overdoing it.
Mulch and plant stems: the volcano mistake
One of the most common — and damaging — mulching mistakes is piling mulch directly against tree trunks and shrub stems. This is sometimes called "volcano mulching" because of the cone shape that results.
Constant moisture against bark causes rot, disease, and insect damage. The correct approach is to keep mulch several inches away from any trunk or stem. The mulch ring around a tree should look like a donut, not a volcano.
What type of mulch works best in Illinois
For most residential gardens in the Chicago suburbs, shredded hardwood mulch is the standard recommendation. It breaks down over two to three years, adding organic matter to the soil, and stays in place better than wood chips in windy conditions.
Dyed mulches (brown, black, red) are popular for appearance but use the same base material. The coloring is generally safe, but premium undyed hardwood is preferable for vegetable gardens or beds with edibles.
When to mulch
Spring is the most common mulching time — after the ground has warmed but before weed season is in full swing. Fall mulching can also be beneficial for perennial beds, adding winter insulation to root systems.
Fresh mulch every one to two years maintains the right depth and keeps beds looking well-kept. It's one of those maintenance tasks where the appearance benefit is immediate and significant.
Contact us to get fresh mulch applied to your beds this season. We handle the delivery, application, and cleanup.