Why should you leave worm castings in the garden?

Author: Aude Godfryd

These little clumps of soil created by earthworms are a sign that your garden is doing well. Here are our arguments for keeping them.

From insects to earthworms, your garden’s hosts contribute to the health of your garden, from the soil to the treetops. Earthworm dung also has its uses.

What are castings?

During the spring and fall, it is common to see small corkscrew-shaped mounds of soil on the lawn. It is castings, also called twists, earthworm secretions that come from the digestive system of invertebrates that emerge from one of the numerous underground galleries they form. Their size varies between a few millimeters and a few centimeters, depending on the species and number of earthworms present.

Why do I have a lot of worm castings in my garden?

Hardened and poorly drained soil is a veritable playground for earthworms, who can have fun burrowing their way through the underground passages and emerging to the surface, leaving you with these famous mounds as a gift.

What is the point of worm castings in the garden?

The presence of worm castings in your garden should be viewed positively as it is a result of your soil doing well. The work provided by earthworms in the underground really allows both to enrich the earth with nutrients, organic and mineral substances (potassium, nitrogen, phosphorus, magnesium and calcium) and to aerate it for better drainage and better conditions for the roots of various types of plants. plantations, as well as better infiltration of rainwater, in the medium and long term.

The various arrivals and departures during which earthworms feed on organic matter allow the soil to be nourished both on the surface and underground, bringing balance to both zones and giving them an auxiliary function for the gardener.

You can even use worm castings as fertilizer to feed your plants.

What should I do if I still want to get rid of it?

If the presence of these castings bothers you, it is possible to spread them regularly with a rake, a light bar or a lawn comb to keep the lawn intensely green without observing unsightly little piles. This operation is done when the ground is dry.

Another option is to aerate the soil more so that the earthworms have less room to maneuver and therefore cannot make more casts.

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