Watch your lawn schedule

If your grass suddenly looks like it grew an inch overnight, that is normal for April: Kansas State University said on April 7 that spring weather is when lawns “begin to grow more quickly,” which is why mowing schedules need to restart now instead of waiting for summer. (extension.k-state.edu) The basic rule experts keep coming back to is not a fixed calendar day but a season-long rhythm: the Royal Horticultural Society says a traditional neat lawn usually needs mowing weekly or every two weeks from March through October. (rhs.org.uk) That sounds simple until weather changes the pace. The University of Maryland Extension says cool-season turf grows fastest in spring and autumn, while warm-season turf grows fastest in summer, so a lawn in Maryland and a lawn in Texas can hit their peak mowing months at different times. (extension.umd.edu) The reason frequency changes is that mowing is not just cosmetic. Michigan State University Extension says cutting leaf tips pushes turf plants to make new shoots, which thickens the lawn the way trimming hair can make it look fuller. (canr.msu.edu) But cutting too much at once does the opposite. Illinois Extension says to follow the “one-third rule,” which means never removing more than one-third of the grass blade in a single mow because scalping weakens the plant and exposes soil. (extension.illinois.edu) Height matters as much as timing. Illinois Extension lists common mowing ranges such as 2 to 3 inches for Kentucky bluegrass and perennial ryegrass, and 2½ to 3½ inches for tall fescue, which is why “mow every Saturday” is less useful than “mow when it reaches one-third above target height.” (extension.illinois.edu) Spring is also not the moment to cut everything short. The Royal Horticultural Society says the first cuts of the season should be on the higher side, because grass is just coming out of winter and lower cuts can stress it before strong growth fully returns. (rhs.org.uk) Summer changes the plan again. The Royal Horticultural Society says mowing is not necessary during prolonged dry spells, because drought-stressed grass is already under pressure and close cutting can leave it brown and patchy. (rhs.org.uk) By early autumn, the schedule often picks up one more time. The Royal Horticultural Society says September and October bring mild, damp conditions that help lawns recover, which is why many lawns still need regular cuts before winter slows growth down. (rhs.org.uk) So the practical version is this: start mowing as spring growth accelerates, expect roughly weekly or fortnightly cuts through October, raise the blade in spring and drought, and let grass growth decide the date instead of the date deciding the cut. (extension.k-state.edu) (rhs.org.uk)