In April the woods at Muttontown Preserve go up in dogwood and shadbush before the oaks have thought about leafing out, a reminder of how much a north-shore spring can accomplish in three weeks. GreenSnap Inc. Landscaping & Design starts its year on that note — beds drawn, plantings chosen for how a yard will read in June and again in October, the front walk given a reason to be looked at. Lawn care runs underneath all of it: mowing, edging, trimming, the cleanups that bookend the growing season. A design only holds if someone keeps cutting it, and here both halves belong to the same hands. Syosset, Jericho, Woodbury and Plainview are the home ground.