Before you bag up all those fallen leaves and send them to the curb, consider this: leaves are one of the best free resources for your garden. They’re packed with nutrients, they improve soil structure, and they provide winter protection for your plants. Here’s how to put them to work.
Why Leaves Are Garden Gold
- Free mulch: A 2 to 3 inch layer of shredded leaves insulates roots and suppresses weeds through winter.
- Soil builder: As leaves decompose, they add organic matter that improves drainage in clay soils and water retention in sandy soils.
- Nutrient recycler: As leaves break down, they return nutrients to the soil where your plants can use them.
- Habitat for beneficials: A leaf layer provides overwintering habitat for pollinators, beneficial insects, and other garden helpers.
How to Use Leaves in Your Garden
Shred Them First
Whole leaves can mat together and smother plants or repel water. Run your mower over them a couple of times to chop them into smaller pieces. Shredded leaves break down faster and stay in place better. If you don’t have a mower, a leaf blower with a vacuum/mulch function works great too.
Spread as Mulch
Apply a 2 to 3 inch layer of shredded leaves around perennials, shrubs, and trees. Pull the mulch a few inches away from trunks and stems to prevent moisture buildup and rot. This insulating layer protects roots from freeze-thaw cycles and reduces the need for watering next spring.
Add to Compost or Work Into Beds
Shredded leaves are an excellent “brown” material for your compost pile. Mix them with “green” materials like kitchen scraps for balanced decomposition. You can also work shredded leaves directly into vegetable beds and annual beds. By spring, they’ll have broken down and enriched the soil.
A Couple Things to Watch For
Avoid Black Walnut Leaves: Black walnut trees produce a chemical called juglone that is toxic to many plants, especially tomatoes, peppers, potatoes, and blueberries. Don’t use black walnut leaves as mulch or add them to compost that you’ll use on sensitive plants. If you have a walnut tree, bag those leaves separately.
Spring Cleanup: In early spring, gently pull back some of the leaf mulch from perennial crowns so new growth can emerge. You don’t have to remove it all. Just thin it out and let the rest continue to decompose in place.
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