Late on a winter afternoon the Mystic River goes the color of pewter and the light quits early, which is exactly when the walks need opening. Mystic Earth Care keeps a sustainable hand on the ground it tends: maintenance through the growing months, enhancements when a bed or a border wants more of something, installation when something new goes in the soil. Come December that same attention turns to snow and ice management, drives and paths cleared while the tide runs out under the bridge. It is one property across both halves of the year, held to one standard — leave the soil better, leave the path passable. Groton and the villages along the river get land that is looked after rather than merely cut.