Heavy clay soil can be a real challenge for gardeners. It’s rich in nutrients, but its dense, sticky texture often leads to poor drainage, slow warming in spring, and stubborn compacted layers. You might be asking yourself — can worms help? Absolutely!

Worms are nature’s best soil conditioners. As they tunnel through heavy clay, they open up compacted layers, dramatically improving drainage and allowing air to reach plant roots. Plus, their nutrient-rich castings help to feed your plants naturally.

Earthworms are among the best allies a clay soil gardener can have. Not only do they aerate compacted soils, but their castings also neutralise pH imbalances and boost microbial life, essential for strong plant growth.

At Wiggly Wigglers, our Garden Worms are ready to work even in tougher soils.

How to Add Worms to Clay Soil:
Start by digging lots of small holes throughout your garden bed, about 15–20cm deep. Drop a small handful of worms into each hole and replace the soil gently. Mixing in compost or leaf mould beforehand can make the environment more welcoming. Be sure to mulch the surface to keep moisture levels steady — vital for worms working through heavy clay.

Over time, you’ll see your clay soil transform from heavy and claggy into a more crumbly, easily worked texture.