Description Plant PURPLE STAR in your garden for a spectacular display of purple star-shaped flowers.  PURPLE STAR flowers most of the year. Plant Useage Plant PURPLE STAR in garden beds or tubs on your patio for a spectacular display.  When in flower you can take pots of PURPLE STAR indoors for short periods. Growing Conditions PURPLE STAR prefers a well-drained soil.  In full sun or part shade you can grow PURPLE STAR in garden beds or tubs on your patio. Plant Care Prune during the warmer months.  Use slow release fertilizers at the recommended rates in October and March.  Keep moist but not wet.