A well-kept property pays its people back every day — in the walkway you take without thinking, the bed edge that makes the whole front of the house look intentional, the patio where a July evening stretches longer than it should. C Parks Inc. works out of Plaistow, that flat green shoulder of Rockingham County where New Hampshire leans down into the Merrimack Valley, pine woods and old orchard land giving way to dooryards along Route 125. The work runs both halves of the year: design and installation — patios, walkways, natural and segmental walls, columns and pillars, landscape lighting, irrigation designed, installed and repaired, beds and plantings, turf and sod, outdoor fireplaces and fire pits — and the steady maintenance that keeps it honest, mowing and weed wacking, bed edging and mulching, rotational weeding, re-seeding and overseeding, pruning and trimming, annual flowers set out in spring and again in fall. There is a particular satisfaction in the moment a wall goes plumb and a mulch line goes crisp, when the yard stops looking like a job and starts looking like it grew that way. From Plaistow across greater New England, the aim is a place that holds its shape and gets better the longer you live on it.