There is some belief that lawns should be mown higher in the fall and spring. Research at the University of Illinois and other Land Grant institutions shows little change in turf density or color by raising the mowing deck. Maintain turf at the same mowing height throughout the year. Lawns should be mowed at their correct height throughout the year.
Research does indicate that taller grass usually correlates with a deeper root system.
Closely mown grasses tend to be thicker and dense, but their root system tends to be shallow making plants more susceptible to hot, dry weather. Copyright Information Copyright 1995 by the Board of Trustees of the University of Illinois. The information provided is for educational purposes only. References to commercial products or trade names do not constitute an endorsement by the University of Illinois and do not imply discrimination against other similar products.