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    Save the Date: Perennial Plant Society’s 30th Plant Sale is April 4, 2020, 9 a.m. – 1 p.m. at the new Expo 3 Building at The Fairgrounds Nashville. Here’s where you can find the newest varieties of perennials, shrubs, vines and annuals from local growers, along with long-time, never-fail favorites, ready for spring planting. Learn more at the PPS website.

     

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Fall leaves = free mulch

Question: We have several maple trees that blanket the lawn with leaves in the fall. Can we rake these off the lawn into the garden beds to use as mulch?

 

fall-leavesFall leaves are a good source of mulch for garden beds. As they decompose, they improve the soil structure and return nutrients to the soil, and as mulch, they help retain moisture in the garden beds and slow the growth of winter annual weeds that may pop up.

You could just rake them or blow them off the lawn directly into the beds, but it’s better to shred them before you pile them on top of the perennials and around trees and shrubs. Leaves that have been chopped up will decompose faster. A thick layer of unshredded leaves may also become matted and smother plants underneath, and may prevent water from reaching the soil. You can chop the leaves by mowing over them and collecting them in a bagging attachment, or by using a leaf shredder.

Here are guidelines for using leaves as mulch are from the UT/TSU Extension office:

*Use a 3- to 4-inch layer of shredded leaves around trees and shrubs in annual and perennial flower beds.

*Mix leaves into kitchen garden beds and in beds where you plant annual flowers. Most of the leaves will decompose before planting time next spring. A bonus: if you have heavy clay soil, a thick layer of leaves tilled into the soil will improve the soil structure.

*Be aware that oak leaves may change the pH of the soil over time, making it more acidic, so you may have to apply lime to maintain a favorable number. If your beds are mulched primarily with oak leaves, you should have the soil tested about every three years. Oak leaves are also tougher and decompose more slowly, so it’s especially important to chop them before you use them to cover your perennial beds.

Leaves can also be added to compost as one of the carbon-rich “brown” ingredients. If, after you’ve chopped and used as much of your bounty of leaves as possible on the garden beds, save the rest to use later in the compost, or for mulch again next spring. Bag the leaves and keep them dry so they don’t decompose by the time you need them again in a few months.