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Generally, it is not necessary to remove old mulch before applying a new layer. As organic mulch breaks down, it enriches the soil with nutrients. However, you should remove the old layer if it shows signs of fungus or disease, which can be common in moist areas, or if the total depth is already too thick. Avoid letting the total mulch depth exceed 3 inches, as this can harm plant roots. If you do remove old, disease-free mulch, it can be added to a compost pile.

Foxtail grasses grow annually, making their appearance in the first months of the year from January through April. They dry out by late spring, which is when they are the biggest threat to your pets. However, some of these pesky foxtail weeds are perennial and live for several seasons before dying out.

If you don’t have too many fallen leaves, one option is to leave them in place. They’ll eventually decompose, adding vital nutrients to the soil. But if you have a thick layer of leaves smothering your lawn, you’ll want to either mulch them or bag them up for removal. If you choose to collect and bag your leaves, check with your local municipality on any specific guidelines to dispose of them. Many cities offer curbside pickup if the leaves are disposed of in yard waste bags or containers. 

Removing leaves from your lawn and yard has a few benefits. Leaves that cover your lawn over the winter can block sunlight from reaching your lawn, smothering and even killing the grass. Leftover leaves in your yard can create bare patches that you’ll need to reseed in the spring to return the grass to its former glory. Hiring a leaf removal company can save you time and labor, especially if your lawn is large or you have a high density of trees dropping leaves in your yard.