In April the Flat River Reservoir throws a cold blue light back at the hills, and the bare ground along Coventry's shoreline roads starts asking for green. That is the season Always Green Hydroseeding, Inc. lives for — the slurry going down in long even passes, the soft tint spreading over raw soil, the waiting, and then the first blush of new grass coming up thick enough to walk on. Lawn care here means reading the pitch of a yard, where the runoff wants to travel, which corner the pines keep in shade until noon. There is real satisfaction in returning to a lot that was mud in March and finding a lawn in June. Coventry offers every kind of ground to work with, from sandy flats to stubborn clay, and each one gets its own approach.