In late June the light over Mill Creek Park hangs on past eight o'clock, and the lawns along the pond hold the last of it down in the grass. Diligent Landscaping keeps South Portland yards through that long green stretch — mowing on a rhythm the turf can count on, trimming close along fences and foundations, raking the beds out in spring and again when the maples let go. The satisfaction is in small things: a strip of grass cut even from the sidewalk clear to the back hedge, a bed edged so the mulch stays where it was put. Rain comes in off Casco Bay and everything grows back by the weekend, so the work is never finished, only kept. Lawn care in a city of short blocks and narrow front yards.