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Power seeding machines do a great job of creating narrow trenches in the soil to plant grass seeds into, but aerating before power seeding can be beneficial for your lawn. By aerating first, more water, oxygen, and carbon dioxide can reach the roots of your germinating grass seeds. Plan to aerate your lawn about once or twice a year, whether you plan to power seed or not.

There are several possible reasons why your Bermuda grass is not thick, with the biggest reasons being too little water, too much shade, compacted soil, drainage issues, and too few nutrients in the soil. Bermuda grass needs frequent and direct sunlight to stay thick, so thinning grass is likely the result of a lack of sun. 

Yes, it's usually necessary to water the lawn after liquid aeration. Water helps activate the aeration product and distribute it evenly into the soil. Proper watering also aids in breaking down soil compaction and enhances the overall effectiveness of the treatment. Follow the recommended watering guidelines provided by the product manufacturer to ensure that your lawn receives the full benefits of liquid aeration and achieves the desired results.

Almost all lawns can benefit from aeration, but not all lawns need aeration services. If your lawn has puddles of standing water, uneven grass growth, thinning grass, dries out quickly, or has a good amount of thatch, aeration is worthwhile. On the other hand, if your lawn is healthy and your soil isn’t too compact, you may be able to skip a year of aeration.