Late fall around Arsenal Street is all long shadow and low sun, the big trees in Arsenal Park dropping everything they have across the lawns nearby. KOSKO LANDSCAPING clears it — leaves off the grass, corners raked out, borders redrawn before the ground hardens for the year. Through the growing months the same properties are mowed and edged on a weekly turn that keeps them looking deliberate. Once winter takes hold, the trucks plow the drives, open the walks and put salt down where the shade keeps ice around all day. Lawn care and snow removal for Watertown and the towns next door.