On the flats near Kawainui Marsh a yard can begin the month as bare red dirt and end it as a soft, unbroken sheet of green. Aloha hydroseed works that turn — spraying new lawns in, then mowing and edging to keep the young grass even once it takes hold. Mauka showers slide off the ridge in the early morning and water the work for nothing; by the time the day warms, the slurry has set and the first blades are showing through. There is a real pleasure in walking a lot you seeded weeks earlier and finding it thick enough to sit down on. Around Kailua that is the whole ambition: get the green started, then hold it level and clean right up to the edge of the driveway.