3.5 – 4.0 inches tall but 4 – 4.5 inches tall is best.

It is the single most important thing that is done all year.

NO!!! Give the lawn a break because chances are it is stressed out from the heat. (even if you have irrigation)

NO. They are not. There are no “permanent” solutions to weed control, but, a strong lawn care program will keep them controlled.