It is hardy to zone 6 and is not frost tender. It is in flower from April to May, and the seeds ripen in July. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees. It can fix Nitrogen. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils, requires well-drained soil and can grow in nutritionally poor soil. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires dry or moist soil and can tolerate drought. The plant can tolerate maritime exposure. It can tolerate atmospheric pollution.