Lathyrus tuberosus, commonly known as tuberous pea or earthnut pea, is a climbing perennial herb native to a range of habitats across Europe and western Asia, including rough grassy areas, woodland edges, and banks. It is particularly associated with calcareous soils, which are typically chalky or limestone-rich, and it thrives in loamy soils that provide adequate drainage. The plant can reach up to 4 feet in height and is characterized by its pinnate leaves and clusters of attractive pinkish-red flowers that bloom in the summer, offering a modest yet charming display.

The tuberous pea is valued for its edible, nutrient-rich tubers, which have a long history of use in traditional European cuisine. In cultivation, it is often grown for its ornamental flowers and as a curiosity for its edible underground parts. It is suitable for border planting, cottage gardens, and naturalized areas. The plant prefers full sun to partial shade and requires moderate watering, making it relatively easy to maintain. While not commonly found in commercial nurseries, it can be propagated by seed or division of tubers. Gardeners should be aware that, like other Lathyrus species, it can be susceptible to powdery mildew and other fungal diseases. Additionally, the seeds and foliage contain a neurotoxin and should not be consumed.CC BY-SA 4.0