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The frequency of lawn aeration depends on various factors such as soil type, grass variety, and lawn usage. In most cases, aerating once a year, typically in the fall or early spring, is sufficient to maintain a healthy lawn. However, lawns subject to heavy foot traffic or especially compacted soil may benefit from more frequent aeration, possibly every six months. It's essential to assess your lawn's specific needs and consult with a lawn care professional if you're unsure about the ideal aeration schedule for your property.

You can thicken new grass by using fertilizer, watering it 1 to 1½ inches per week, mowing when it is at an optimal height, and preventing weeds. You should fertilize your grass while you plant the grass seed, or soon afterward. Use an herbicide to prevent weeds or spot spray with herbicide to kill existing weeds.

A manual spike aerator or aerator shoe is a very affordable way to aerate a lawn. Such devices can often be purchased for between $30 and $50. Liquid aerator is another affordable option, but this enzymatic spray may not work as well as actual, physical aeration for helping ease compacted soil and may take several applications.

The grass could be dying because it’s overwatered or underwater. Additional issues include over-mowing the lawn, compacted soil, or a fungal disease in the lawn. In many instances, regular maintenance can keep grass from dying.