Awarded an rhs agm phlox douglasii 39red admiral39 is an evergreen perennial forming a mat of narrow green leaves which become completely smothered in rich crimson45pink flowers from april to june moss phlox is perfect as an evergreen groundcover plant at the front of sunny borders rock gardens or in patio containers where it will spill elegantly over the sides height 15cm 4063441 spread 30cm 40123441