This plant has been in my garden for many years and performs well with little or no care.
It does come up rather late in the spring so I find it best to mark it's place. I have oriental poppies growing under this plant.
The very large white flowers are a definite eye catcher in the late season garden,and the plant tall enough for vertical appeal. I leave the dry stalks on over winter on this plant because it is near a winter bird feeding station and the birds find the dry stalks a good perch while waiting their turn at the feeder.