The answer to 'when to grass' is that the best time to plant or overseed a lawn is in the fall, typically between September and November. This is the optimal time for cool-season grasses like fescue, bluegrass, and ryegrass to establish strong roots and grow vigorously before the winter. The cooler temperatures and increased rainfall in the fall provide ideal conditions for grass seed germination and establishment.
Planting grass in the fall allows the grass to develop a deep, healthy root system over the winter months. This gives the lawn a strong foundation to withstand the stresses of the following summer, such as heat, drought, and heavy foot traffic. Seeding or sodding in the fall also helps the lawn outcompete weeds, which tend to be less active during the cooler months.