Lupinus angustifolius, commonly known as narrowleaf lupin, is an annual herb native to the Mediterranean region, including parts of Eurasia and northern Africa, and has been naturalized in Australia and North America. It thrives in a variety of habitats including open woodlands, coastal areas, and disturbed sites. This plant typically grows to a height of 1-2 feet (30-60 cm) with a similar spread. Narrowleaf lupin has palmate leaves with narrow leaflets and produces spikes of pea-like flowers that can be blue, purple, or white, blooming in late spring to early summer. The flowers are moderately showy and attract pollinators.

Narrowleaf lupin is valued for its nitrogen-fixing ability, which improves soil fertility, making it useful as a green manure crop. It is also grown for its edible seeds, which are used in various culinary applications, and as fodder for livestock. In cultivation, it prefers full sun to part shade, well-drained soils, and moderate watering. While it is relatively low maintenance, it can be susceptible to fungal diseases and aphid infestations. Gardeners should be cautious about its potential invasiveness outside its native range and check local regulations before planting.CC BY-SA 4.0