What is thatch?

What is thatch?

• A. A tightly intermingled layer of decomposing stems and roots that develops between green vegetation and the soil surface
• B. A shallow soil layer high in organic matter
• C. A fungal disease affecting leaf blades
• D. A layer of moss on the soil surface

Answer: (A)

Thatch is the layer of plant material that sits between the green turf canopy and the soil surface. It’s made up of tightly interwoven stems, roots, and crowns, often partially decomposed, that accumulates faster than it breaks down. A small amount is normal, but when it becomes thick it can impede water, air, and fertilizer from reaching the roots and can shelter pests and diseases. This description matches thatch as a distinct organic mat between the turf and soil, not a soil surface layer, a disease, or moss.

Thatch is the layer of plant material that sits between the green turf canopy and the soil surface. It’s made up of tightly interwoven stems, roots, and crowns, often partially decomposed, that accumulates faster than it breaks down. A small amount is normal, but when it becomes thick it can impede water, air, and fertilizer from reaching the roots and can shelter pests and diseases. This description matches thatch as a distinct organic mat between the turf and soil, not a soil surface layer, a disease, or moss.