Centennial Park fills right up on the first genuinely warm weekend in Champaign, and that is the same weekend the phones start ringing for anybody who cuts grass. The Original Lawn Guys L.L.C is ready for it. Lawn care from the first green flush through the last cut of the year — mowing, trimming, edging, and hauling off what the season sheds. Grass on this old prairie ground grows with real enthusiasm, and keeping pace with it takes a route, a rhythm, and someone who actually shows up. A yard kept on schedule never has a bad week, and that is the whole idea.