By September the light over Hastings Park goes long and gold, and the Lexington lawns beneath it are heading into their best month. New Englandscape Inc works that turn — the cut kept high through the heat, then dropped as the nights cool, with overseeding and beds set back in order while the ground is still warm. The rest of the year it is weekly mowing, fence lines trimmed, walks edged, mulch laid around porches and stone steps. Fog off the Great Meadows settles into the low yards on autumn mornings and burns off about the time the first route is finished. Cleanups take the leaves in fall and the winter's leftovers come spring.