My newest bog, installed in the zone stretching spot at the inside corner of the angle formed by the intersection of my slate patio and asphalt driveway. It's reserved for low growing plants such as VFTs, Pings, and orchids. There's a statue of William Penn on top of city hall in Philadelphia, and for a very long time it was the unwritten rule that no building in the city could be taller than the rim of his hat. Sadly that is no more, but no leaves may protrude above the top of the lowest stone in the wall surrounding this bog. Flower spikes are exempt from the zoning restrictions.