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 Mulch needs to be water- and air-permeable, so as not to smother the plants below. Apply fall mulch when the ground is frozen or near frozen.
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In spring and summer, mulching helps control weeds. In fall mulching has a different purpose. During the months ahead, temperatures can change radically. The ground heaves as it freezes and thaws, forcing the root systems of many plants up from the soil and exposing them.Mulch helps maintain a more even temperature and also raises the freeze line, which encourages earthworms to work closer to the surface of the soil. Make sure you have cleaned up mulch from summer. Leaving it can invite disease and rodents. Apply fall mulch when the ground is frozen or near frozen.
Leaves
- Chopped leaves make a great organic mulch that breaks down throughout the year and adds nutrients to the soil. Apply about six inches of leaves for mulch.
- Don't use whole leaves for mulching; they will pack down and keep air from getting to the soil.
- If you're not going to use leaves as mulch, don't burn them. Not only is it against fire codes in certain areas, it produces fumes that are damaging to the environment. Add them to your compost pile instead.
Wood Shavings
- Use about three to four inches of wood shavings for mulch.
- Choose hardwood shavings rather than pine or spruce for better moisture retention.
- This is a good decorative mulch to use around trees. Leave space between the trunk of the tree and the mulch.