For general mulching purposes, spreading bark to a depth of 2.5 to 5 centimetres (1 to 2 inches) is recommended. This layer aids in moisture conservation and provides moderate weed control. In areas prone to heavy weed growth, increasing the mulch depth to approximately 5 centimetres (2 inches) enhances its suppressive effect.
When conditioning soil, particularly if it’s heavy or chalky, incorporating a thicker layer of bark can be beneficial. Applying composted bark fines to a depth of up to 10 centimetres (4 inches) improves soil structure and fertility over time.
It’s crucial to avoid piling mulch directly against plant stems or tree trunks, as this can lead to moisture accumulation and potential rot. Maintaining a small gap between the mulch and plant bases ensures proper air circulation and reduces the risk of disease.
Regularly monitoring and replenishing mulch as it decomposes will sustain its benefits, contributing to a healthier and more aesthetically pleasing garden environment.
