As long as the grass is actively growing, you need to keep mowing. Only low enough that you do not cut more than one-third of the grass blade at a time. Cool season grass is on top of its growth during spring, meaning that you will need to mow the lawn frequently during this season. Keep in mind that some of the fertilizers used in lawns will provide a certain amount of nutrients that will be absorbed by the turf but will not be immediately utilized by the grass. This may result in excessive top growth. When there is high growth, mowing will need to be done multiple times a week.

A typical lawn mowing service usually includes the following tasks: 1. Mowing the lawn: This involves using a lawn mower to cut the grass to a desired height. 2. Trimming: This involves using a string trimmer to cut the grass in areas that the lawn mower cannot reach, such as around trees, fences, and other obstacles. 3. Edging: This involves using an edger to create a clean boundary between the lawn and hard surfaces like sidewalks and driveways. 4. Blowing off hard surfaces: This involves using a leaf blower to blow away grass

You can stop mowing when the grass blades stop growing. Cool season grass stops its growth when the temperature drops below 40F or exceeds 90F. On the other hand, the growth of the roots will continue all throughout fall until winter.