Irondequoit Creek runs through Ellison Park in a green trough that stays cool while the rest of Rochester bakes, and the neighborhoods around it grow grass like they mean it. Ecotree LLC keeps pace with that growth — mowing, string trimming, edging along walks and driveways, and seasonal cleanups that clear winter's litter in April and the leaf fall in November. The good stretch of the year is short and fast here, and holding a weekly line through it is the whole discipline. A lawn cut on time looks calm, and calm is the result worth chasing.