What is the correct amount of mulch to use?

When using natural mulches, such as shredded bark and wood chip materials, the recommended thickness for use around trees, shrubs and evergreens is 3 inches. Remember to periodically add more mulch to planting areas as it decomposes, but be careful not to exceed the 3-inch thickness at any time.

Mulching around perennials is also recommended to help conserve moisture and to help control weeds. Apply 1 to 2 inches of mulch around plants, however be sure to keep the mulch at least 2 inches away from plants’ stems to avoid possible damage.