At noon in July the shade under Deshong Park's old trees is the only cool thing in Chester, and everything else is growing hard. Augusta Lawn Care of West Chester spends that heat on mowing, edging, trimming and cleanups — the weekly rhythm that keeps a property from getting away from its owner. A lawn cut on schedule looks different than one cut when somebody finally gets around to it, and the difference shows from the street. Beds get tidied, borders get cut clean, the walk gets blown off before the truck pulls away. Between the park blocks and the neighborhoods running east, that steadiness is the whole job.