This nutrient rich material is mixed into the soil where plant roots can use the nutrients. Also, by incorporating litter into the soil, worms reduce the number of fungus spores on the soil surface and that can help prevent plant diseases such as apple scab. Like all living organisms, worms need a suitable habitat in order to thrive. Here are some suggestions to improve worm habitat in your yard. Provide worms with organic matter for a food source.
Worms eat plant residues.
Mulches such as grass clippings or leaves will provide a food source. Mulches also will help moderate soil temperatures in the summer, making the upper layers of the soil more desirable for worms. Worms, as well as plants, do best with moderate levels of soil moisture. Too much or too little moisture is bad for both worms and your plants. Reduce your use of pesticides.