On the older streets near the library, the yards carry beds that have been there longer than most of the houses' paint, and in April they want hands more than horsepower. Pro Garden Landscaping LLC opens the season right there — spring cleanup, edges recut by hand, mowing and trimming started on a weekly schedule. Summer is upkeep, autumn is leaves, and then the whole thing flips: plowing, shoveling and de-icing once the cold takes hold. Two kinds of tidy, six months apart, done with the same eye. Lawn care and snow removal for Harvard and its neighboring towns.