Lathyrus setifolius: complete guide

Overview

Lathyrus setifolius, commonly known as Brown Vetchling or Narrow-leaved Red Vetchling, is an interesting Mediterranean scrambling plant from the Fabaceae family, the legume family. This plant originates from Mediterranean regions, spanning from the Canary Islands to Turkey. This is a lightly climbing or spreading plant producing brown-red to purple flowers and distinguished by its characteristically very fine leaves.

Lathyrus setifolius is popular with garden designers seeking something unusual and authentically Mediterranean. The plant has a charming, delicate appearance and produces interesting seedpods that attract birds.

Appearance and Bloom

Lathyrus setifolius grows to 30 to 60 centimeters in height with very narrow leaves resembling hair fibers. This gives the plant a very airy, grass-like appearance despite being a legume plant. The stems are thin and flexible, allowing the plant to spread easily or wind around support structures.

Flowers appear in April through May and are brown-red to purple colored. Though not notably large, they are highly refined and appear in small clusters. Following blooming, characteristic pods develop containing seeds. These fruits remain ornamentally interesting for extended periods. This is a plant for those who appreciate delicate, fine forms.

Ideal Location

Lathyrus setifolius thrives in full sun to very light shade. The plant performs optimally with at least five to seven hours of direct sunlight daily. In extremely hot climates, afternoon shade protection can be beneficial. This plant suits Mediterranean gardens, dry slopes, and rock gardens.

The plant can grow against support strings or light climbing structures, or simply sprawl over rocks and other low vegetation. Plant it in locations where it can spread freely without smothering other plants.

Soil

Lathyrus setifolius accepts very well-drained soils and thrives in both alkaline and acidic soils. The ideal substrate is sandy to gravelly with minimal fertility. The plant is very tolerant of nutrient-poor soils. Heavy clay and permanently wet soils must be strictly avoided.

A pH between 6.0 and 7.5 is ideal. The plant is a legume and actually improves nitrogen content in soil around its roots. Excessive nitrogen can stimulate unwanted soft growth. A well-drained sandy soil is most suitable.

Watering

Once well-established, Lathyrus setifolius is very drought-tolerant. During the first growing season, water regularly until the plant establishes (approximately six weeks). Thereafter, water can be drastically reduced. In rainy periods, no supplemental water is needed.

The plant can survive short drought periods. During extreme heat, occasional deep watering can be beneficial. Excessive moisture can lead to root rot. In winter, water minimally.

Pruning

Pruning is minimal. After flowering, spent stems can be removed to keep the plant neater, though this is optional. Leave some seedpods to form seed and for bird attraction. The plant naturally spreads from seed.

Young material can be gently pinched to encourage more compact growth. Aggressive pruning should be avoided.

Maintenance Calendar

Spring: Water regularly as growth begins. Brown-red flowers appear April-May. Possible planting period.

Summer: Minimal watering in extremely dry periods. Seedpods ripen. Let seed fall naturally.

Autumn: Plant gradually dies back. Seeds have dispersed. Minimal maintenance activity.

Winter: Plant is dormant. No water needed. No fertilizing or pruning.

Winter Hardiness

Lathyrus setifolius is hardy in zones 7 to 9 in the UK. This is a plant that can survive mild winters, especially on very well-drained sites. The plant is often treated as annual or biennial.

In harsh winters, protection with sharp sand or gravel helps. However, the plant is easily rebuilt from seed from the previous season.

Companion Plants

Lathyrus setifolius combines beautifully with other Mediterranean plants: lavender, rosemary, santolina, various sedums and other drought-tolerants. Silver foliage plants provide nice contrast. Plant it where it can spread freely without smothering other plants.

In rock gardens, it pairs well with low-growing material. Plant it where butterflies and bees can easily reach it.

Final Thoughts

Lathyrus setifolius is a perfect choice for those seeking something unusual and authentically Mediterranean. With its fine foliage, delicate brown-red flowers and easy self-seeding, this is a workhorse plant requiring minimal attention. Begin this season with this charm and enjoy the elegance of Mediterranean flora.