Summer evenings the thunderheads stack up over Mount Graham until the mountain vanishes inside them, and then the storm walks north across the valley. Nash Outdoor Solutions works the Pima yards those storms leave behind — mowing grass that leaps after a soaking, trimming, edging, and clearing branches, leaves and blown-in litter off the turf. Rain here delivers a season's worth of growing in a few weeks, and the lawn does not wait politely for anyone. There is something plainly good about pulling into a yard the morning after, mud still sitting in the low spots, and leaving it level and open. The valley smells like wet dust and mesquite the entire time you are doing it.