This may hasten the loss of Kentucky bluegrass and fine fescues, but will prevent serious problems of excessive thatch formation. This mowing height will not significantly decrease the turftype perennial ryegrasses. If these mowing heights are maintained, renovation should never become necessary provided the lawn is properly maintained through fertilization, watering, mowing, and annual dethatching. The removal of dead stems and surface roots and accumulated organic debris of all sorts will prevent excessive thatch formation and the necessity for renovation. As thatch builds up in a lawn, the mower tends to run higher from the ground, especially where lightweight mowers are used.
Excess thatch can also serve as a home for insects and increased disease development.
Roots will develop where oxygen supplies are greatest and saturated soils have very low oxygen concentrations. Thorough, infrequent watering is much more desirable than light, frequent applications and is regulated by soil texture and depth. Light, frequent applications tend to encourage weedy grasses and certain broadleaf weeds and decrease the quality of desirable grasses. Close observation of the turf will indicate the need for water before wilting or browning occurs. A soil probe can be used to feel the soil for its moisture content.