The Yellow River slides past Lilburn under a canopy that closes over the greenway by June and holds until the first cold snap. Hernandez Tree Service LLC works Gwinnett County's close-set lots, where an old hardwood stands between a deck, a fence and somebody's power drop. Patient pruning and trimming keep those trees where they belong, and removal is there for the ones that simply cannot stay. Autumn storms have a habit of pulling a limb out of a tree that looked fine all summer, and the cleanup that follows leaves behind nothing but clean lawn. A neighborhood keeps its shade only if someone is tending it, and that is what this work amounts to.