The question is often asked whether it is good to mow lower in the spring. The answer is yes and no. It doesn’t hurt to mow lower than normal the first mowing or two.
As a matter of fact, it can actually speed green-up by removing old, dead grass and allowing the soil to warm up more quickly.
But the mowing height should be raised to normal after the first or second cutting to discourage crabgrass and encourage deep rooting.
A low mower height can promote weed growth. Crabgrass seed must have light to germinate, and a high mowing height will help shade the soil.
Also, root depth and mowing height are related on upright growing grasses such as tall fescue and Kentucky bluegrass — the higher the height of cut, the deeper the root system. A deeper root system means a more drought-resistant turf.
So, how low should you go on the first cutting? On tall fescue and Kentucky bluegrass, you can mow as low as one to one-and-one-half inches. Be careful you don't go so low that you scalp the turf.
After that, raise the mowing height for Kentucky bluegrass to two to three inches but three to three-and-one-half inches for tall fescue.
Other rules of thumb to remember when mowing are to never take more than one-third of the grass and to sharpen your blades often.
For more information on lawn care, check out our webpage at www.ford.ksu.edu or call the Ford County Extension Office at 620-227-4542.