The old sycamores along the Delaware lean over Yardley's river streets, and in high summer the lawns beneath them stay cool and green well into the afternoon. keystone landscaping tends those yards — mowing, edging along walks and curbs, trimming, and clearing whatever falls through the season. Between the borough's tight lots and the wider properties out toward Lower Makefield, no two cuts are laid out the same way. Finishing a street with the edges crisp and the clippings off the sidewalk is a good hour's work well spent. keystone landscaping serves Yardley and the surrounding Bucks County towns.