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Annual BiennialGrass Like

Setaria macrostachya

plains bristle grass

S. macrostachya is a perennial grass usually grown as an annual, with linear leaves becoming brown with maturity, and slender, millet-like flowering panicles in summer

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Brown
Summer Green Green Brown
Autumn Green Brown
Winter
Position
  • Full sun
  • Partial shade
Aspect

North–facing or East–facing or South–facing

Exposure
Exposed or Sheltered
Hardiness
H3
Botanical details
Family
Poaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Setaria can be annual or perennial grasses, with linear to elliptic leaves and small flowers in a panicle, the spikelets with a tuft of conspicuous bristles

Name status

Correct

Plant range
Mexico, adjacent USA

How to grow

Cultivation

Grow in light, well-drained soil in full sun or partial shade

Propagation

Propagate by seed sown in mid spring

Suggested planting locations and garden types
  • Coastal
  • Cottage and informal garden
  • Wildlife gardens
  • Banks and slopes
  • Flower borders and beds
Pruning

Cut back after flowering

Pests

Generally pest-free

Diseases

Generally disease-free

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