What is thatch?

Thatch is accurately described as a layer of organic matter that accumulates on the soil surface. This organic matter primarily consists of dead and decaying grass blades, roots, and other plant material that has not fully decomposed. Thatch plays a significant role in turf management because it can influence water penetration, nutrient availability, and disease susceptibility within the grass.

When thatch is present in appropriate amounts, it can provide a beneficial cushion for the turf and help retain moisture within the soil. However, excessive thatch buildup can lead to problems, such as preventing water and nutrients from reaching the grass roots effectively. Proper management practices, such as core aeration and dethatching, are essential to maintain optimal turf health and performance.

In this context, other options are less accurate: compacted soil relates to physical soil structure rather than organic matter; pests pertain to living organisms that harm the grass, not a physical layer; and fertilizers are nutrient additives, not a form of organic accumulation. Understanding thatch and its implications is crucial for effective turfgrass management.