Rocky Knoll Farm
Dark Sister
$30
Dark Sister features deep purple flowers with a burgundy tone. Each bloom has a delightful red-speckled texture. Expect blooms mid-season and plant in partial shade to full sun. Hardy to about -10°F when protected against windchill. Dark Sister can grow to about 5' tall and 5' wide at maturity. We like to say it's a cool name for a cool plant.