The first warm Saturday of a Quincy spring sounds like every mower in the county starting at once. Custom Turf Inc is out in that noise, cutting, trimming and edging lawns from the first green flush all the way through the last mow of fall. Turf in the river valley comes up thick; it takes water well and forgives nothing, so the timing of each cut matters. The payoff is a surface that looks even from the street and feels even underfoot, right out to the corners. Work runs across Quincy and the towns around it.