North toward the Hooksett line the pines crowd the river and the yards give way to sand and needles under a high canopy. Walker Landscaping LLC works those properties across the whole year — mowing, string trimming, and edging when the grass is up, cleanups when the pines and hardwoods let go, and clearing snow, opening walks, and salting once the Merrimack starts steaming in the cold. Shaded northern lawns come in slow and thin, so cutting height and timing matter more than horsepower. In winter the reward is simpler and louder: headlights, a blade, and a driveway that goes from white to black in three passes. Then on to the next one before the coffee cools.