Cambridgeport's dooryard gardens are small enough to take in at a single glance, which is exactly why the details show. J and Z landscaping keeps them mowed, edged and trimmed through midsummer, with mulch in the beds and cleanups when the season opens and closes. Evening light comes down the numbered streets and lands on whatever was cut that day, a good hour for judging your own work. Between parked cars and brick sidewalks, most of the finish comes down to hand work. Small yards, cut and edged on schedule, make a whole block look better.