What can lead to excessive thatch accumulation in turfgrass?

Excessive thatch accumulation in turfgrass is primarily influenced by soil conditions, including pH levels and compaction. Low pH can lead to poor nutrient availability and impaired microbial activity, which are crucial for the decomposition of organic matter, including thatch. Compacted soils further exacerbate this issue by restricting water and air infiltration, limiting the growth of roots and microbial populations that help break down thatch.

While factors like watering schedules and fertilizer applications can impact turf health, they do not directly relate to the accumulation of thatch as strongly as soil pH and compaction do. Regular aeration practices are actually beneficial, as they help alleviate compaction and promote soil microbial activity, thus aiding thatch decomposition rather than contributing to its buildup.