Avena sativa

RHS Plant Profile
oat

Other common names

cultivated oat, haver

Synonyms

Avena orientalis

Grass Like

An annual grass grown primarily as a cereal crop or for green manure. It has an upright, tufted growth habit, producing slender stems that bear loose, open panicles of oat grains. It typically reaches a height of between 60cm to 1.5m. The green to bluish-green leaves are narrow, linear, and grass-like, measuring approximately 20 to 40cm long and up to 1.5cm wide with a slightly rough texture. It produces small, pale green to golden flowers in loose, nodding panicles. The flowers appear from late spring to early summer (May–July) and develop into characteristic oat grains. It turns golden yellow before dying back at the end of the growing season

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Poaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Tufted
Genus
Name Status
Correct

How to Grow

Cultivation

Grows well in a wide range of soil, but thrives in moist, but well-drained soil in full sun. See Creating wildflower meadows for further advice

Propagation

Propagate by sowing seeds outdoors

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildflower meadow
  • Wildlife gardens

Pruning

For more information see our page on how to cut back deciduous grasses

Pests

Generally pest-free in an informal, non-agricultural setting but maybe susceptible to aphids, wireworms and cereal leaf beetles

Diseases

Generally disease-free in an informal, non-agricultural setting