How deep should the mulch be around my trees?

Mulch around a tree should be spread like a donut, not a volcano. Never allow mulch to touch the tree’s bark, and do not pile it higher than 3 to 4 inches. Mulch too deep decreases the exchange of oxygen and carbon dioxide, which can lead to fungal and bacterial diseases. Very deep mulch may also prevent rainwater from reaching the soil and tree roots. It is best to mulch with wood chips or other coarse organic material.

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1. How deep should the mulch be around my trees?
2. Who do I contact with tree-related issues?
3. What is a Certified Arborist and why should I always use them?
4. What types of trees are recommended for Bay Village?
5. Where can I buy trees?
6. What are the benefits of having trees?
7. What are those numbered metal tags on my street trees?
8. When can I prune my oak trees?