When to aerate a tall fescue lawn
For tall fescue, early fall is generally the best time to core-aerate, ideally paired with overseeding. Spring works as a second choice. Avoid aerating in summer heat or drought.
Signs you need it
Water puddles or runs off, the soil is hard to push a screwdriver into, or the lawn sees heavy foot traffic. Clay soils usually benefit more often than sandy soils.
Soil moisture matters
Aerate when soil is moist but not soggy — often a day or two after rain or a good watering. Dry, hard soil limits core depth; saturated soil smears.
Pair with overseeding
The holes give new seed good soil contact. Overseed right after aerating, then keep the seed moist until it is established.
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Rescue my lawnEducational guidance only. Local rules and product labels control; a soil test is more reliable than general advice.