What can I do about the worm casts on my lawn?

By | 04/03/2012
Worm cast in a lawn

Worms work their way through the soil, breaking down organic matter. A worm cast occurs on the surface of the soil and is a small mound of muddy soil ejected from the digestion system of some species of these earthworms. Some lawns can have a large amount of worm activity.

Worm activity in the winter can be a problem for many types of lawns. If you are the proud owner of a fine, ornamental lawn, worm casts may spoil the look and cause it to become lumpy and uneven. If you use your lawn as an additional room of the house enjoy the outdoors, then worm casts in autumn and winter can be a problem. They are stepped in, causing a muddy patch, and the mud can be trampled into the house or spoil your new shoes. These patties of soil are also fantastic seed beds for weeds, moss and all the other nasties that you have been spending all the previous year trying to eliminate!

Worm casts on your lawn

The problem is that worms are great for your soil. They make their way through the soil, digesting the goodness and breaking down organic matter. They also create channels in the soil which helps to aerate the soil. We really don’t want to kill the worms, or stop them from performing their valuable service on your soil.

By regularly inspecting your lawn and just sweeping away worm casts as you find them will tackle the problem. Once a week, walk your lawn. Using a stiff household broom or a long flexible cane, simply brush the casts aside. This will spreading out the topsoil which has been pushed to the surface. This will allow the grass beneath to poke through and see the sun. Done regularly, this will help keep your lawn looking smooth throughout the winter months.

There are some worm control products available on the market, but I don’t recommend them as they can harm worms.

Kris Lord

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