Plant: Blue lupin is a deep rooted (2.5 m) and erect plant with strong stems growing up to 1.6 m in height. They are a self regenerating annual legume. The stems and seed are bitter due the presence of alkaloids.
Stems: Robust hairy stems.
Leaves: Leaves with up to seven leaflets, hairy.
Flowers: Blue pea flowers formed along a spikelet. Regarded as self pollinating.