HABIT: Compact/mounding --SIZE: Grows to 3 ft tall, 3-4 ft wide. --HARDINESS: Hardy to -40 degrees F* (USDA ZONE 3) --EXPOSURE: Sun to partial shade. Well drained soil. --DESCRIPTION: Lilac-pink flowers are 1.5" across. Orchid Lights is more compact than others in the Lights series and boasts extreme hardiness.