What is the recommended mowing height for Kentucky bluegrass?

Kentucky bluegrass is best maintained at a mowing height of 2.5 to 3.5 inches. This height is optimal for promoting a healthy lawn for several reasons.

First, mowing at this height encourages deeper root growth, which is crucial for drought resistance and overall lawn health. A taller grass height allows Kentucky bluegrass to develop a stronger root system, aiding in nutrient uptake and increasing resilience against stress factors such as heat or foot traffic.

Additionally, maintaining the grass at this height helps to shade the soil, reducing evaporation and keeping the soil cooler. This is particularly beneficial during hot summer months, as it can prevent the soil from drying out quickly, which can stress the grass.

Furthermore, Kentucky bluegrass that is mowed at the recommended height is less susceptible to weed invasion. Taller grass shades the ground, inhibiting the germination of many weed species that prefer open, sunny conditions.

In contrast, mowing at heights lower than 2.5 inches can result in unrecoverable damage, decreased vigor, and increased susceptibility to pests and diseases. Heights above the recommended range may lead to an unkempt appearance and can make it difficult to manage diseases due to excessive moisture retention in the turf.

Overall, maintaining Kentucky bluegrass at