Lathyrus pratensis aka Meadow Vetchling

Lathyrus pratensis is known as meadow vetchling or common vetchling. It belongs to Fabaceae, the pea family. Its native range runs from Europe to Mongolia and the Himalaya. It also grows wild in Morocco, Ethiopia, and Yemen. Britain and Ireland form part of its native range too. It grows in mild regions with a temperate climate. Its sites include grassland, scrub, and hedgerows.

This leafy perennial lives for more than two years. It scrambles, climbs, or trails through nearby growth. RHS gives a garden height of 3.3–4.9 feet [1–1.5 metres]. Its account of the stems gives about 3.9 feet [1.2 metres]. The listed spread is 0.3–1.6 feet [0.1–0.5 metres]. The stems have angled edges and bear tendrils. The narrow leaflets are bright green and grow in pairs. They grow along the stems. The plant sheds its leaves for winter. Once settled, it spreads by stems below ground, called rhizomes. RHS lists one year as the time to reach full size.

The flowers are yellow and shaped like pea flowers. They bloom from May through August. Long flower spikes bear five to twelve blooms each. Black seed pods follow the flowers. Chicago Botanic Garden says the plant draws butterflies. That source says its creeping growth suits beds and borders. RHS also suggests wildflower meadows and gardens for wildlife. The blooms add summer colour among grasses and other meadow plants.

Grow it in soil with a moderate level of nutrients. RHS says to grow it in full sun. Chicago also lists part shade. It suits moist soil that drains well. RHS lists chalk, clay, loam, and sand as suitable soils. It also lists acid, neutral, and alkaline soils. PFAF, though, says wild plants avoid acid soils. Chicago lists moderate water needs and USDA zones 5–7. RHS rates it H6 for growing in Britain. Sow seeds in autumn for the best results. It needs no pruning. RHS reports few problems with pests or disease.

PFAF lists no known edible uses and gives edibility zero. RHS warns people and pets not to eat pods or seeds. It also says to wear gloves and protective gear when handling plants. PFAF records a traditional use of seeds as medicine in Spain. This does not mean the seeds are safe to use. PFAF also lists nitrogen fixation, which lets plants use nitrogen, as useful. It reports a claim that the plant repels mice. Treat this as a reported use, not a proven garden benefit.