2005 Year in Review

Mulching Fall Leaves

Source: Duane Friend, Extension Educator, Natural Resources Management, friend@uiuc.edu

With many communities imposing burning bans, homeowners are looking for alternative ways to take care of fall leaves. One of the easiest and most beneficial options is to simply mow the leaves in place. Mowing leaves allows nutrients such as phosphorous and potassium in the leaves to be returned to the soil, which then can be used by turf or other plants.

Studies done by Michigan State University have shown no adverse effect to turf when leaves were mowed in place and allowed to decompose. The key to a successful mulching of leaves is to use a rotary mower, go slow, and to mow the leaves when they are dry. The mower can be kept at the same height as usual. If leaf fall is heavy, it may be necessary to make 3 or 4 passes to shred the leaves properly. The finer the shred, the faster the leaves will decompose. Typically, these leaves will settle into the turf within 1 to 2 days, especially if rain occurs after mowing.

Since it may take several weeks for all leaves to fall, it may be necessary to mow newly fallen leaves every 3 to 4 days during this time. Areas that are heavily shaded may not work as well.

While studies have not shown any benefit for additional nitrogen, MSU suggests applying ½ pound of nitrogen per 1000 square feet, in addition to any normal fall lawn application, to aid leaf disintegration.

Mulching leaves and allowing them to decompose on turf is a viable option for homeowners. It is more beneficial to the environment than burning, and does not harm grasses if done properly.

by  Editor, theCity1.com
October 28, 2005