Why You Should Mulch Trees After Planting

The Benefits of Mulching Newly Planted Trees in Alberta

Mulching is one of the simplest yet most effective steps you can take to protect and support a newly planted tree. Whether you’re planting in a residential yard, commercial space, or municipal project, applying mulch properly can significantly improve tree health, reduce maintenance, and promote long-term growth.

At Alberta Tree Planting, we highly recommend mulching every newly planted tree — and here’s why.

Benefits of Mulching Newly Planted Trees

🌱 1. Moisture Retention

Mulch helps the soil retain moisture by slowing evaporation. This is especially important during Alberta’s dry summers and windy conditions, when newly planted trees are most vulnerable to drought stress. A consistent moisture level supports strong root establishment.

❄️ 2. Temperature Regulation

A layer of mulch acts as insulation, keeping the soil cooler in summer and warmer in winter. This helps protect young roots from temperature extremes and freeze-thaw cycles common in Southern Alberta.

🌾 3. Weed Suppression

Mulch prevents weeds and grasses from competing with the tree for water and nutrients. This is especially critical in the first year, when young trees are developing their root systems and cannot compete effectively.

🛡️ 4. Protection from Damage

Mulch provides a buffer zone around the tree, discouraging lawnmower or trimmer damage to the trunk. Mechanical injuries are one of the leading causes of stress and disease in young urban trees.

🌿 5. Soil Improvement

As organic mulch breaks down, it enriches the soil with nutrients and improves its structure. Over time, this enhances microbial activity, aeration, and the overall health of the root zone.

Best Practices for Mulching Trees

To get the full benefit of mulching, it’s important to apply it correctly:

• Use organic mulch such as shredded bark, wood chips, or composted leaves. Avoid synthetic materials.

• Apply a 2–4 inch layer over the root zone. In very sandy or exposed areas, 4 inches may be beneficial.

• Keep mulch away from the trunk — leave a 2–4 inch gap around the base to prevent rot and pests.

• Extend mulch out to the drip line if possible (this is where the tree’s roots are actively growing).

• Replenish as needed, usually once a year in spring or fall.

Should Every Tree Be Mulched?

In nearly all cases, yes. Whether you’re planting a caliper tree, a sapling, or a large landscape tree, mulch offers protective benefits that are especially important in the first 1–3 years after planting.

Need Help with Tree Planting and Mulching?

At Alberta Tree Planting, we do not include mulching in our regular tree installation services. But let us know if you would like us to mulch for you anbnd we can provide an estimate! We want to give your new trees the best start possible.

📞 Contact us today to request a quote or learn more about our residential and commercial tree planting services in Calgary, Okotoks, and Southern Alberta.