April along the bluffs above the St. Joseph, and the whole valley changes color in roughly four days. Spring Green works Niles through that turn and everything that follows — mowing on a rhythm, trimming, edging, feeding thin turf, cleanups at both ends of the year. Grass in this river country will grow like it means it if you give it a reason to. The satisfaction is a lawn that comes in even from edge to edge: no thin corner, no scalped rise. Then you do it all again next week, which is the honest part of the trade.