Are there tracks in the lawn? Are there tons of weeds despite a good fertilizer with weed prevention? Are pests becoming a problem? Is water pooling in the lawn after heavy rains? Are there bare spots that you haven’t been able to help? The soil might have compacted, and it might just take a little aerating to make the lawn thrive. If the lawn is primarily clay soil or it’s a dry area, you’ll need to aerate more frequently. There’s a simple and pretty unscientific way to tell when it’s time to aerate. Grab a stick. If the soil is difficult to penetrate with the stick, you should aerate. You should choose a nice, clear day to aerate. If the soil is wet, you will have a huge mess and a lot of explaining to do as to how your lawn repair caused more damage. You’re also going to get compacted soil much more quickly if it’s wet. If it’s too dry, you won’t be able to penetrate the soil with an aerator. Pay a...