Rumex hymenosepalus is a PERENNIAL growing to 1 m (3ft 3in). It is in flower from May to July. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.