Does bark mulch encourage earthworms

Earthworms play an important role in healthy soil, and many gardeners are keen to know whether bark mulch helps to attract them. In short, yes, bark mulch can create conditions that earthworms find appealing. By covering the soil, it locks in moisture, and damp ground is exactly what worms prefer. They tend to thrive in shaded, cooler soil where the surface doesn’t dry out too quickly, and a layer of bark provides just that.

As the bark gradually breaks down, it contributes organic material to the soil. Earthworms feed on decomposing matter, pulling particles down into the soil as they tunnel. This activity helps to improve aeration and drainage, while also enhancing the availability of nutrients to plant roots. Over time, a garden treated with bark mulch is likely to support a more active and beneficial worm population.

It is worth noting that not all bark breaks down at the same speed. Larger, chunky bark will take longer, offering moisture control but less immediate food for worms. Finer grades decompose more quickly and provide a richer environment for soil life. Gardeners looking for quality bark suitable for encouraging natural soil activity can find a wide selection through AHS LTD.