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It depends on the current health of your lawn. Liquid aeration takes longer to work, but the results are longer lasting. Since you can apply the liquid solution several times during the course of the growing season, the results are cumulative. Core aeration, on the other hand, will offer quicker benefits but they will diminish sooner, right along with the soil plugs left behind.

Aerating a lawn before seeding it or adding new grass seed is a smart decision. By loosening up compact soil and allowing it to take in more air and water, your seeds will have an easier time establishing roots and growing. Aerating beforehand also means your seeds will have better contact with the soil, so more of your seeds have a chance to germinate. If you do plan to aerate your lawn before seeding, aerate about two days before you plan to start seeding.

First, you should figure out whether you have dormant or dead grass. Dead grass won’t come back, so you’ll have to reseed if you’re hoping for a lush lawn. However, grass can go dormant if it hasn’t received enough water or if temperatures are too cold. If it’s still decently warm outside, you can revive dormant grass by watering it. But if it’s mid-January in New England, for example, you’ll need to wait until the weather warms up again. If you want to keep grass green in winter, consider a grass like Kentucky bluegrass, which maintains its color year-round.

Power seeding and aeration are both great ways to improve the health of your lawn, but one isn’t better than the other. Aeration alone doesn’t involve planting grass seeds; instead, this service is focused on improving soil health. Aeration is a great service to do before any type of seeding to make seeding more effective.