From the tower on Garrison Hill the whole arrangement is visible at once — Dover rooftops, the river bending east, the low hills going blue toward Maine. Dean Brothers Landscaping works everything under that view in its turn: mowing, trimming, edging, mulching and cleanups through the growing months, then plowing, shoveling and sanding once storms start tracking up the coast. Winter arrives wet off the ocean and heavy, the kind of snow that has to be moved twice. Summer arrives green and fast and wants a mower every week. Same properties, opposite problems, one truck that shows up for both.