Montville is built on ledge — grey shoulders of rock pushing up through the turf, so that keeping a lawn here is a running negotiation with stone. Flat Rock Garage looks after those lawns around Palmertown and the roads that wind between the outcrops. The work is straightforward and it shows: mowing on a schedule, borders trimmed back, clippings cleared, the yard put back in order before the light goes. Summer in the Thames valley is humid and fast-growing, and steady attention is what keeps grass ahead of it. It is a small pleasure, pulling in at the end of a day to a lawn that has been tended.