Down toward Rowayton the mornings come off the Five Mile River wet, and every blade on a lawn holds its bead of water until the sun climbs over the rooflines. Bee Green Lawn & Landcare tends that grass — lawncare through the mowing season, fertilization to carry it along, and organic lawn care for the yards where children and dogs are on the turf all summer. A lawn in this town takes a lot: wind off the harbor, August heat pressing down, then the first cold snap of a September night. Working with the ground rather than against it is what keeps the color even into fall. The work runs across Norwalk, New Canaan and Darien.