In gardens they require adequate moisture and moderate temperatures, so areas of the world where they thrive are becoming less and less due to global warming.
Best grown in partial shade in a sheltered location in cool, moist, well-drained soil. They can be grown in full sun in far northern climates such as Alaska and Maine. 48”x18” Deciduous.
May be short-lived, particularly in sodden winter soils. Native to rock crevices and thickets in the Himalayan Mountains. Hardy to -40 degrees F. Papaveracea.