Lawn aeration before or after fertilizer, Digi Mart USA News: Homeowners who want a thick, green lawn often debate whether to aerate or fertilize first. According to a House Digest article, the recommended approach is to apply fertilizer after lawn aeration.
A core aerator pulls out plugs of soil, creating thousands of small holes. Fertilizing before aerating can cause two problems: rolling the aerator may disrupt the slow-release coating on granular fertilizers, and pulled soil cores can displace a good portion of the product.
Applying fertilizer immediately after aerating places nutrients directly into those holes, delivering them closer to the roots. The article says this supports root growth, helps the lawn recover from aeration, and can lead to stronger, denser grass through the rest of the growing season.
The article notes that aeration is not required every time fertilizer is applied, but it is especially helpful for compacted soil. Foot traffic and heavy mowing can pack soil into a dense layer that limits air, water, nutrients and root expansion.
On compacted lawns, fertilizer may build up in the thatch or wash away in heavy rain instead of reaching the root zone.
According to the article, aeration improves soil structure so air, water and nutrients can move more easily into the soil. The resulting deeper roots may help a lawn tolerate drought and summer heat and recover more quickly from routine care.
The publisher states that aerating before fertilizing helps ensure fertilizer nourishes the grass rather than running off. The source article was not independently verified.
