May in Winthrop begins in mud and ends in green: the ice goes out of the Narrows Ponds, the frost heaves settle, and everything that was gray turns over at once. Dave&son professionallawn care starts the year with the spring cleanup — sand and matted leaves raked off, beds opened up, the lawn given room to come. Then it is weekly mowing, trimming, edging and mulch straight on through the warm months. There is something plainly good about the first real cut of the year, when a yard goes from shaggy to squared-off in a single afternoon. Everything after that is just keeping the promise.