Lychnis chalcedonica otherwise known as maltese cross is the most spectacular of perennials with tight groupings of crimson star45shaped flowers displayed on statuesque stems the maltese cross flowers throughout the mid45summer months giving spectacular colour and excitement to the back of sunny borders lychnis chalcedonica thrives in a moist boggy location so is perfect at the edge of garden ponds and in marsh45like areas maltese cross is the proud holder of an rhs agm hei