|My favorite mulch; free leaves|
Shredded leaves. When dead leaves are shredded they're often used as a mulch; they decompose quickly and greatly improve the soil. I use them exclusively on my own yard. You’ll never see shredded leaf mulch advertised or sold because it’s abundant and totally free. I just mulched up the leaves on my lawn, so I won't have to fertilize this spring. These ground-up leaves contain a lot of carbon and other nutrients, so it's a shameful waste just to bag them up and discard them.