Autumn Mowing: Adjusting Care for Warm-Season and Cool-Season Grasses

Memphis is situated in a transition zone, making it home to both warm-season grasses, including Bermudagrass and Zoysiagrass, and cool-season grasses like Tall Fescue. Each type has specific growth patterns and care requirements. Warm-season grasses thrive in the heat of summer but enter dormancy in cooler fall temperatures. In contrast, cool-season grasses grow actively during the cooler months, making fall an important time for their maintenance.

As autumn approaches, warm-season grasses such as Bermudagrass and Zoysiagrass begin to slow their growth. It's crucial to adjust your mowing height accordingly. For Bermudagrass, maintain a height of around 1 to 2 inches until the grass stops growing. Zoysiagrass should be mowed at a slightly higher height of about 2 to 3 inches. This height helps protect the grass crowns from potential frost damage and promotes healthier turf for the next growing season.

Tall Fescue, as a cool-season grass, continues to grow well into the fall. Mowing should be conducted regularly to maintain a height of 2.5 to 3.5 inches, which helps the grass withstand stress from winter conditions. Regular mowing also prevents the grass from becoming too tall, which can lead to increased disease susceptibility and poor air circulation. It's important to leave grass clippings on the lawn to return nutrients to the soil.

Fall is a critical time for lawn care, particularly in preparing for the upcoming spring. Soil testing is highly recommended to determine nutrient needs and pH levels. Testing every three to five years can help guide fertilization and amendment strategies. Additionally, mulching leaves into the lawn can improve soil health by enhancing nutrient availability and structure, as decomposing leaves add organic matter and help retain moisture.

To ensure optimal growth and health of your lawn, conduct a soil test to assess nutrient levels and pH. The results will guide you in selecting the appropriate fertilizers and amendments. Local Extension offices often provide soil testing services. Implementing a tailored fertilization plan based on soil test results will enhance lawn performance and reduce environmental impact.

As the seasons shift, so should your lawn care practices. Understanding the unique needs of both warm-season and cool-season grasses in Memphis will help maintain a lush and healthy lawn. Adjust mowing heights, conduct soil tests, and embrace sustainable practices like leaf mulching to support your lawn's health through the fall and into the spring.