|Grown for its large, 4-inch, semi-double pink flowers with purple underneath the outer tepals. This popular, long-lived perennial with a woody base reaches up to 5 feet tall. Adds color to partial shade, fall borders. Plants in areas with harsh winters will benefit from a fall mulching. Staking may also be necessary, especially to keep arching plants upright after a rain. Divide in fall or early spring. Contact with sap may irritate skin. Sometimes referred to as 'Queen Charlotte'. Slow to establish, but then spreads rapidly.