What is topdressing, and when is it typically applied?

Topdressing is the practice of applying a thin layer of compost, soil, or a similar organic material to the surface of a lawn or garden. This technique is often employed to improve the health and quality of the lawn by enhancing soil structure, increasing nutrient availability, and promoting healthy microbial activity. It is particularly beneficial for addressing issues such as thatch buildup by breaking it down and aiding in soil aeration.

Typically, topdressing is applied in the spring or fall when grass is actively growing, allowing the added nutrients to be readily absorbed and utilized by the plants. This timing helps to encourage strong growth and recovery, especially after the challenges of winter or the stresses of summer heat. The process can also be beneficial after overseeding, as it helps to protect the seeds and provide them with a nutrient-rich environment for germination.

In contrast, the other options do not accurately describe topdressing. Adding a layer of mulch is more commonly associated with gardens and flowerbeds rather than lawns, while watering plants with fertilizer and applying pesticides relate to other maintenance practices not directly linked to topdressing.