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Yes, you can DIY either core or liquid aeration for your lawn. You can use a manual core aerator or rent an automatic one. Just be sure to mark off yard obstacles like sprinkler heads before you start. Liquid aeration is easier—just hook up a garden pump sprayer, although some are able to be attached to a hose. While liquid aeration is not as laborious as core aeration, you will need to focus on an even distribution of the solution across your entire lawn for it to be effective. Of course, if you are unsure about doing both, call a pro.

When your sod is new, you should keep an eye on it to prevent dehydration. As new sod plants its roots into the soil beneath it, it can easily get dehydrated and start to turn brown. Keeping a consistent watering schedule for your new sod will help prevent this issue and will help it thrive as it roots into your yard.

Once your sod is about six weeks old, you can start to establish a regular lawn maintenance routine, complete with mowing, edging, and fertilizing.  

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.

Yes! Aerating your lawn during its dormancy period—usually over winter and early spring—can cause a disturbance that the grass may not easily recover from. Instead, you should aerate your lawn during its peak growth period, usually in the late summer or early fall (though with some variation based on specific grass type).