Hirschfeldia incana is a ANNUAL growing to 1 m (3ft 3in). It is in flower from June to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees.Suitable for: light (sandy) and medium (loamy) 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 dry or moist soil.