From Great Hill in North Weymouth the city stands up across the water on a clear day, small and pale beyond Hingham Bay, and the whole neck feels like a balcony. Green Horizons Landscaping covers lawn care and snow removal for the homes along those heights and the flats below them. Summer is mowing, trimming and edging on a set schedule with cleanups at either end of the growing season; winter is plowing, shoveling and de-icing well before daylight. Exposed ground up here bakes dry in August and freezes iron-hard in January, and both facts shape how the work gets done. A property that looks right in both extremes takes someone paying attention on the days in between.