Onobrychis viciifolia

RHS Plant Profile
sainfoin

Other common names

cock's head, common sainfoin, common saintfoin, esparcet, esparsette, fodder grass, French grass, holy clover

Synonyms

Onobrychis sativa

Herbaceous Perennial

A bushy, hardy perennial wildflower to around 75cm in height, with green, pinnate foliage. Upright spikes of nectar-rich, pea-like pink-red flowers with darker striping appear from May to September, tending to sprawl and spread out amongst other plants if not supported. A great pollinator plant for many varieties of bees and extremely drought tolerant, thriving on very poor soils, and nitrogen-fixing. An ideal addition to chalky wildlife meadows

Position

Full sun

Soil Types

Chalk, Loam, Sand

Size

Time to Maturity
2–5 years

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
H7
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Fabaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Clump forming
Genus
Name Status
Correct

How to Grow

Cultivation

Grow in free-draining, chalky soil in full sun. May take a year to establish. Great as part of a wildflower border or meadow planting scheme

Propagation

Propagate by seed in spring or division of established clumps in early spring. See sowing seeds indoors for further advice

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildflower meadow
  • Wildlife gardens

Pruning

Deadhead to encourage fresh growth. Cut back after flowering

Pests

May be susceptible to aphids and slugs and snails

Diseases

May be susceptible to Fusarium wilt, sclerotinia disease and root and crown rots