The plants are quite hardy, and if they have been planted out for a few years and grown to a large size they can withstand occasional frosts. They are grown in full sun, in a very well drained soil. In areas with very cold winters they need attention during the cold season. Cover them with non-woven fabric, or grow them in pots, so you can move them into a cold greenhouse in early November.
Specimens that have been planted out for some time donít need much care. They are content with rainwater and donít need fertilizing. The young plants are planted out in May-June, and need sporadic watering over the first months, to facilitate proper germination.