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The best way to fix a lumpy yard depends on the cause. However, in many cases, you can address yard lumps by improving the health of your soil and turfgrass. Choose grass varieties that are best suited for your area and look for disease-resistant varieties. Fertilize and water your lawn as needed to keep it looking lush throughout the warmer months. Mow your grass at a height of 2 to 3 inches once or twice a week.

The frequency of lawn aeration depends on factors such as soil type, grass variety, and lawn usage. In general, it is recommended to aerate cool-season grasses like Kentucky bluegrass or fescue once a year during the fall. On the other hand, warm-season grasses such as Bermuda or zoysia benefit from aeration in late spring or early summer. However, it's essential to assess your lawn's specific needs, as signs of compaction and reduced grass health may indicate the need for aeration outside these general guidelines.

Throwing grass seed on existing lawn isn’t likely to germinate, grow roots, or become healthy grass. You need to prep the soil, spread fertilizer with your seed, and sow the seed into the soil. Water the seed every day for two weeks to ensure it germinates and grows roots. Be sure to stay off the area and wait to mow until it reaches optimal height.

You can try that, but it isn't likely to yield results. It's like watering potted plants without putting the seeds in. Most of the tossed grass seeds sit on top of the soil or existing grass blades and never germinate. The seeds need to make it into the soil, just like growing a potted plant. The best way to accomplish this is to aerate your lawn first, then overseed.