Answer: The best time of year for lawn work is late summer to early fall, so you will want to get started soon. The best approach to improving your lawn is to improve the soil first. I would suggest you run some basic soil tests to check fertility and pH levels. Then amend with fertilizer and/or lime according to the test results. Next, if the lawn is compacted, do a core aeration and top dress with compost. Finally, seed again this fall.
Your local county extension should be able to help you with the soil testing and interpreting the results. Also, they should be able to help you develop a custom lawn improvement and maintenance plan based on the conditions in your yard, and recommend the best type of grass seed for you to plant. Good luck with your lawn improvement!
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