When grass produces seedheads

Seedheads in lawns are a natural process that can’t be avoided, but keeping your mower blade sharp and applying fertilizer will keep the lawn healthy and looking good.
Kevin Frank, Michigan State University Extension, Department of Plant, Soil and Microbial Sciences –
The cool season turfgrasses growing in Michigan have been in full-blown seedhead production mode in the last week. The common lawn grasses, Kentucky bluegrass, perennial ryegrass and tall fescue all produce seedheads as do some grassy weeds like annual bluegrass (Poa annua). Seedhead production requires energy from the plant, so it is likely the turf will not only look stemmy due to the seed stalks, but the turfgrass may even thin out.