What is the effect of moisture retention in mulch?

Moisture retention in mulch is significant because it helps to create an environment that is less conducive to weed growth. When mulch is applied to soil, it acts as a barrier that retains moisture in the soil beneath it. This moisture retention supports the growth of desirable plants while limiting the germination and establishment of weeds, which often struggle to thrive in drier conditions.

Additionally, mulch helps to maintain more stable soil temperatures, which can further benefit desirable plant species over weeds. The thickness and type of mulch can influence how efficiently it retains moisture, with organic mulches being particularly effective at suppressing weeds due to their ability to provide both coverage and nutrients as they decompose.

Therefore, the main effect of moisture retention in mulch is its ability to suppress weed growth, making it an essential practice in effective turf and ornamental weed management.