Aeration can take place at any time of the year, but the best time is usually in the spring/early summer or fall. The general recommendation is to core aerate when there is the most root growth. Cool-season grasses: bluegrass, ryegrass and the fescues, receive the most benefits when the lawn is aerated in the fall.
Moreover, how often do you aerate the lawn?
Different soil types require more frequent aeration. Clay soil compacts easily and should be aerated at least once a year. You can aerate a sandy lawn once a year, or you could tackle the chore in alternating years. In arid climates, aerating twice a year will enhance turf growth and health.
When should you aerate and overseed your lawn?
Spring and fall are good times to aerate, fertilize and over seed your lawn so air, water, and nutrients can really penetrate deeply, softening the soil, and promoting root growth. Use a core aerator when the soil is moist and soft, not dry, and not muddy.
Do you really need to aerate your lawn?
No, it's not necessary to aerate your lawn every year, especially if your grass is healthy and thriving. Aeration is good if you've got compacted, poor or clay-heavy soil that's been impacted by heavy equipment or lots of foot traffic. It's also good to aerate if you are renovating a yard or installing a new one.