A very robust plant, capable of succeeding in the wild garden and tolerating considerable neglect.
It succeeds in most fertile well-drained soils, though it prefers a moist but well-drained rich sandy loam and a neutral or alkaline soil in sun or partial shade. Prefers a humus-rich soil in shade or partial shade. Grows well in cool moist woodlands with light shade where it can spread freely. Plants occasionally grow in old walls and also succeed in the dry shade of trees.
Plants are hardy to at least -15°c and are self-fertile.