What to do with fall leaves in the garden: shred them into mulch

Mississippi State's mulch bulletin says whole leaves may mat when wet or blow away when dry. Penn State says shredded leaves mat down less than whole ones, and that watering the layer after you spread it helps it stay in place. Illinois Extension adds that shredded leaves break down faster and are less likely to be blown by the wind.

Source: MSU Extension P2301, mulches, checked October 9, 2026; Penn State Extension, Leaves Are Treasure, Not Trash, checked October 9, 2026; Illinois Extension, Don't bag your fall leaves (2025), checked October 9, 2026.

• 2 to 3 inof shredded leaves over perennial beds (Delaware)Delaware Extension, Recycling Leaves, October 10, 2026
• 3 to 4 inaround trees and shrubs (Delaware)Delaware Extension, Recycling Leaves, October 10, 2026
• 8 cu ftcovers a 4 x 8 ft bed 3 inches deepArithmetic
• 1 inor less on a lawn: just mow it in (Delaware)Delaware Extension, Recycling Leaves, October 10, 2026

1. 1

   Mower with the bag on

   Delaware's first choice: put the bag on the mower and run over the leaves where they lie. Empty it into a wheelbarrow, a cart or onto a tarp.

   Source: Delaware Extension, Recycling Leaves, checked October 10, 2026.

2. 2

   Rake a pile and mow it

   Rake the leaves into a pile and run the mower over it several times, Delaware says. Dry leaves cut best.

   Source: Delaware Extension, Recycling Leaves, checked October 10, 2026.

3. 3

   String trimmer in a can

   Fill a sturdy garbage can with dry leaves and dip a string trimmer into it. Delaware lists this as a working shredder.

   Source: Delaware Extension, Recycling Leaves, checked October 10, 2026.

4. 4

   Vacuum shredder, dry leaves only

   A vacuum shredder gives a fine mulch, but Delaware says it can only be used with dry leaves.

   Source: Delaware Extension, Recycling Leaves, checked October 10, 2026.

Work it like any mulch: square feet times depth in inches, divided by 12, gives cubic feet. A gallon is 231 cubic inches, so a 30-gallon bag holds 4.01 cubic feet and a 39-gallon bag 5.21. The gallons are printed on the box. Count bags of shredded leaves, not whole ones.

Wording from each page, checked October 9, 2026.

Source: Delaware Extension, Recycling Leaves, checked October 10, 2026; Penn State Extension, Leaves Are Treasure, Not Trash, checked October 9, 2026; Illinois Extension, Don't bag your fall leaves (2025), checked October 9, 2026; MSU Extension P2301, mulches, checked October 9, 2026.

Delaware says shredded leaves can be spread over annual and vegetable beds and tilled in before spring planting. Illinois says that if you don't want to shred, you can put 6 to 8 inches of whole leaves on a garden and till them in. Illinois also says a 2-inch layer of shredded leaves on a bed turns into a soft brown leaf mulch by spring.

Source: Delaware Extension, Recycling Leaves, checked October 10, 2026; Illinois Extension, Don't bag your fall leaves (2025), checked October 9, 2026.