On a July evening the water off the Mystic Lakes cools the whole north end of Medford, and lawns that sulked through the afternoon stand back up. Lawns Plus Inc keeps them standing: mowing on a regular day, edging drives and walks, trimming around trees, fences and foundations, mulching beds, weeding, overseeding and fertilizing as the calendar calls for it. Spring cleanups start the year and leaf removal closes it, one property at a time, street by street. Grass has a kind of memory — treat it well through one season and it hands the favor back the next. Medford yards mostly, with the surrounding cities close enough to walk to.