Why should mulch be kept away from the trunk when applying mulch around trees?

• A. To prevent decay and rodent problems
• B. To increase trunk growth
• C. To improve trunk insulation
• D. To reduce photosynthesis

Answer: (A)

Keeping mulch away from the trunk is essential because mulch that sits against the bark creates a damp, dark environment at the base of the tree. This moisture promotes bark decay and provides ideal conditions for fungal diseases to take hold. It also offers cover and harborage for rodents and other pests that can gnaw at the trunk or create entry points into the tree. By keeping the mulch a few inches away from the trunk, you improve air circulation, allow the bark to dry after rain, and reduce the risk of base rot and pest damage. Use a shallow, even mulch layer about 2–4 inches thick that circles the tree but does not touch the trunk.