September mornings the Mousam Way Trail smells of wet leaf and river, and lawns finally slow down enough to be improved rather than merely kept up. Hartford's Lawn Solutions leans hard into that window in Kennebunk — aeration, overseeding, a last few clean cuts, feeding, and leaves off the grass before they pack down into a mat. Almost everything a lawn will be next June gets decided in the six weeks after Labor Day. It is unglamorous work, and it plainly works. Kennebunk and the nearby towns are all on the fall route.