The Wonderful World of Worms

Worms are beneficial for the soil beneath your lawn. A high population of worms is usually an indication that the soil is healthy, and a good environment for growing a healthy lawn. Out of the 27 species of earthworm found in the UK, there are actually only 3 species which produce casts. These are the lob worm, the grey worm and the black headed worm. Although they have their benefits, worms aren’t everyone’s favourite, so here are some facts below.

Advantages of Worms


  • Break down organic matter and increase soil fertility.
  • Help increase micro-organisms / soil bacteria populations.
  • Naturally Aerate the soil and improve soil structure.
  • Help relieve the surface compaction in the lawn.
  • Improve surface drainage.
  • Reduces toxic gasses within the soil.

Disadvantages of Worms


  • Muddy worm casts on the surface.
  • Can encourage moles to the area to feed on them.

All in all we believe our lawns are much better off for having worms in our soils than being without. However, their casts can cause an issue for mowing, unevenness and weed germination. Below are our top tips for dealing with worm casts.



  • Brush or pick worm casts off your lawn as often as possible. Leaving them on the surface can cause a bit of a mess the next time you have the mower out.
  • Regularly clear leaves off your lawn as they are a food source for worms.
  • Consider acidifying the soil using sulphur, to deter worms. They prefer neutral/alkaline based soils.
  • Avoid unnecessarily watering your lawn later in the year.