Stipa tirsa

RHS Plant Profile
horsetail feather grass

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horsetail feather grass RHS
horsetail feather grass RHS

Synonyms

Stipa stenophylla

Grass Like

A tufted deciduous perennial grass, with folded, sparsely hairy, bright green leaves, and upright stems with panicles of long, slender, silvery spikelets to 70cm high in summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

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

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H4

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
Stipa can be evergreen or deciduous, mostly perennial grasses with arching, folded or rolled, linear leaves and narrow panicles of often long-awned spikelets in summer and autumn
Name Status
Accepted
Plant Range
Europe to C Asia

How to Grow

Cultivation

Grow in medium to light, moderately fertile soil in full sun. Divide every few years to maintain vigour. See ornamental grasses cultivation

Propagation

Propagate by seed sown in pots in a cold frame in spring, or by division in spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Prairie planting
  • Patio and container plants
  • Flower borders and beds

Pruning

Cut back all dead leaves and stems in late winter or early spring before new growth begins

Pests

Generally pest-free

Diseases

Generally disease-free