Must things to know about your lawn.....
Each time you mow, mow in a different pattern.
This will help prevent the grass from "matting" down from the wheels of the mower.
Don't mow when the grass is wet.
This will result in the mower clogging up, the grass will not cut properly and cause "clumping".
If left on the lawn,the clumps will damage the grass.
Have your lawn mower blades sharpened at least 2 times a year.
Dull blades tear the grass instead of cutting them.
Tearing the grass causes damage.
Rule of Thumb....."The taller the grass the deeper the roots".......
Most grass in the mid west should be mowed to no lower than 3 inches.
As you mow the grass shorter, the root structure is smaller and more supsepible to desease, drought and weeds.
Aerate, aerate, aerate.....
Your lawn should be aerated at least once a year, two times(Spring & Fall) if you can.
Your lawn needs to "breath". After a long winter and alot of foot traffic, the ground becomes compacted.
It is difficult for nutrients, air and water to penitrate the ground when it is "packed so tightly".
Aerating, "opens up the ground, loosing the soild, creating "cavities" for nutrients to penitrate and new grass to grow."