An erect, rhizomatous perennial which has opposite or whorled, elliptic to
lance-shaped dark green leaves. From May to September whorls of cup-shaped
yellow flowers are borne on short stalks from the leaf axils.
Grow in humus-rich, preferably moist but well-drained soil which does not dry
out in summer, in full sun or partial shade. It will reach a height of 1m and a
spread of 60cm.
2 Litre Container £4.50 each (inc. VAT)