This process can also be tricky when the weather is damp or wet, as the casts do not have a chance to dry. This will get rid of the casts and help incorporate the nutrient-rich matter back into your soil.ĭealing with worm casts is harder on fine, short mown lawns. Let the casts dry before breaking them up by using a wire rake or stiff brush, and dispersing them across the lawn. In lawns that are kept long, it is fairly easy to brush off dry worm casts and incorporate them back into the grass. Worm casts are not only nutrient rich matter, but they are also the result of worm activity within the soil, which improves soil structure, encourages microbial activity and decomposition, breaks down thatch, and provides natural aeration to your lawn. There are over 25 species of worms, but only 3 species in the UK create worm casts.Īlthough worm casts can be a nuisance, as they affect the aesthetic appearance of your lawn, they are actually extremely beneficial. They are the nutrient-rich remains of the worm's digestive process, as it feeds on organic matter within the soil. Worm casts are tiny heaps of soil that appear as a result of worm activity within the surface levels of the soil. In this blog, we explain what worm casts are, their effect on your lawn, and how to deal with them. When worms are active in the superficial layer of the soil, especially in the wetter seasons, you may notice small piles of dirt appear on your lawn, also known as worm casts.
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