BITTER-VETCH Lathyrus linifolius

Ytbysen y Coed

Bitter-vetch is a charming native perennial wildflower belonging to the pea family (Fabaceae). It can be found growing in grasslands, heathland, woodland edges and on banks, particularly in areas with acidic, nutrient-poor soils. Its delicate flowers and fine, narrow leaves make it a lovely addition to wildlife-friendly gardens and naturalistic planting schemes.

From spring into early summer, Bitter-vetch produces clusters of small, pea-like flowers that open pinkish-purple and may fade to a bluish colour as they age. Its slender stems and narrow leaflets give the plant a light, graceful appearance, allowing it to blend beautifully into traditional meadows and natural grassland.

Bitter-vetch thrives in full sun or partial shade, preferring well-drained soils that are low in nutrients. It is particularly suited to acidic grasslands, heathland and woodland margins, where it can grow alongside other native wildflowers.

As a member of the pea family, Bitter-vetch has a relationship with soil bacteria that help it obtain nitrogen, making it well adapted to relatively poor soils. It is a good choice for naturalistic planting schemes where a delicate, less vigorous species is desired.

Bitter-vetch is a valuable native plant for biodiversity. Its flowers provide a source of nectar and pollen for visiting insects, including bees, while its foliage contributes to the variety of native plants available to wildlife.

It is also a food plant for the caterpillars of some moth species, including the Six-spot Burnet moth. Like other native legumes, it helps support the ecological diversity of traditional grassland and heathland habitats.

Plant Bitter-vetch in a sunny or lightly shaded position with well-drained, preferably acidic soil. Avoid rich, heavily fertilised ground, as this can encourage stronger-growing plants to outcompete it.

Once established in a suitable location, it generally requires little maintenance. It is ideal for native wildflower meadows, wildlife gardens, heathland-style planting and the restoration of species-rich grassland.

The flowers start out pink but turn purple and and then blue as they age.

A species in decline.

BSBI 2025 Categorisation: Vulnerable

Height: up to 20-40cm

Flowers: April to July

Colour: Purple, pink, blue