How to Mulch a Tree for Winter

Wood chip mulch is both attractive and useful around trees.

Mulch protects a tree's root zone from winter temperature fluctuations. This protection is especially beneficial for young trees that are more susceptible to winter damage. The mulch also helps prevent the soil from drying out completely during dry or windy winter weather. Organic mulches, such as wood chips and bark, provide the most benefit to the trees. If you mulch your trees year-round, replenish the mulch in fall. If not, it's never too late to begin mulching and protecting your tree's roots.

Things You'll Need

• Measuring tape
• Mulch

Instructions

1. Measure the diameter of the trunk of the tree. Trees need a circle of mulch that is 2 feet in diameter for every 1 inch of trunk diameter. Make the circle at least 4 feet in diameter for young trees with trunks less than 2 inches in diameter.

2. Spread the mulch over the soil before the ground begins to freeze in fall. Lay a 3- to 4-inch-thick mulch layer within the circle determined by your trunk measurement.

3. Remove the mulch from around the trunk of the tree, leaving a 2- to 3-inch space between the mulch and the trunk. Insects and moisture inside the mulch can cause trunk damage otherwise.

4. Replenish the mulch every fall to maintain the 3- to 4-inch layer. Expand the size of the mulched area as the tree grows each year.

Tips & Warnings

• Use garden edging around the mulched area so the mulch doesn't slide into grass or paved areas.

References

• Cornell University Extension: That's Mulch Better
• Clemson Cooperative Extension: Mulch