Saturday morning on Hayden Rowe: sprinklers ticking, one dog out early, and mowers starting up on one street after another. Hopkinton Hustle is part of that chorus — cutting grass on a regular round, trimming close along fences and foundations, edging the walks, mulching beds, and clearing the yard in spring and after the leaves fall. Weekends fill up fast in this town, so a lawn handled before noon buys the whole day back. There is real pleasure in finishing a yard while the light is still soft and the shade is still long. Then on to the next one, until the block looks like summer.