North of the city the Niagara River runs fast and cold past Tonawanda, and the neighborhoods along it hold their green late into the fall. JD Landscaping & Snowplowing tends those blocks and the ones behind them — mowing, trimming, edging and seasonal cleanups while the grass grows, then plowing and salting once the storms start stacking up on the walks. The lots between Kenmore and the river sit neat and close together, the kind of street where one tidy yard sets the tone for four more. The work goes in short passes, repeated often. What it buys is a block that looks looked-after in every month on the calendar.