Amsonia 'String Theory' Blue Star
PLANT TYPE: Perennial
SUN EXPOSURE: Part sun, sun
BLOOM TIME : Late summer, early fall
AVERAGE SIZE: 18-22" x 2'8"-3'
COLD HARDINESS: USDA Zone 4
DESCRIPTION: A spring-flowering perennial that provides foliage and texture interest throughout summer. Light periwinkle blue flowers are produced above dark green, threadleaf leaves.