Which of the following cultural practices does NOT impact the quality of a turfgrass lawn?

Planting annual flowers does not directly impact the quality of a turfgrass lawn. This practice typically focuses on ornamental gardening rather than the health or aesthetics of turfgrass specifically. Turfgrass quality is generally defined by its density, color, and overall health, which are influenced by practices aimed directly at grass management.

Aeration helps alleviate soil compaction and improves root growth by allowing air, water, and nutrients to penetrate the soil more effectively. Fertilizing provides essential nutrients that support turfgrass growth and health, enhancing its color and density. Mowing, when done correctly, promotes thicker turf and can help prevent weeds, contributing to the overall quality of a lawn. In contrast, planting annual flowers does not contribute to these specific turfgrass outcomes and instead separates the focus from the lawn itself.