The answer to 'when to seeding' is that the best time to seed your 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 lush, green grass before the winter dormancy period.
Seeding in the fall allows the grass seed to germinate and take root while the soil is still warm and the days are shorter. This gives the new grass seedlings time to develop a healthy root system before the first frost, which helps them survive the winter and thrive in the spring. Seeding in the spring can be more challenging, as the hot summer months can be stressful for the young grass plants.