Start by asking whether the soil is compacted
Aeration is useful when pore space in the soil has been squeezed down by traffic, heavy equipment, dense soil, or repeated use. Common clues include water running off, thin turf along walking paths, hard soil, and shallow rooting.
A lawn growing well in loose soil may not need annual aeration. The service should solve a condition, not simply fill a calendar.
Why fall is often the best window
Most Fort Wayne lawns contain cool-season grasses. As late-summer heat eases, these grasses return to active growth and have time to recover from the temporary disruption caused by core removal. If overseeding is appropriate, the openings also improve seed-to-soil contact.
Spring aeration can be useful in some conditions, but it may conflict with crabgrass-prevention products or arrive before the soil is ready. The actual moisture level matters in either season.
The soil should be moist, not saturated
Rock-hard dry soil limits how deeply the tines penetrate. Saturated soil can smear and compact around the holes. Moist soil generally allows cleaner, deeper cores.
What happens afterward
Leave the soil plugs on the lawn. They dry and break down through rainfall, mowing, and normal use. Continue sensible watering and mowing, and keep heavy traffic down briefly if the ground is soft.
Aeration is not a cure for every thin lawn
Shade, disease, drainage, drought, poor grass selection, and insect damage can also thin turf. Aeration helps compaction; it does not replace diagnosing those other causes.