Stipa calamagrostis 'Algäu'

RHS Plant Profile
rough feather grass 'Allgäu'

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rough feather grass 'Allgäu' RHS
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A clump-forming, deciduous, perennial grass with narrow, arching leaves and feathery, silvery-green flower panicles in summer. It has slightly larger flowers over a longer period than the species. When the flowers and leaves die they turn buff-coloured and remain on the plant all winter

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

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

Position

Full sun
Aspect
West–facing or East–facing or South–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
Bushy
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

How to Grow

Cultivation

Grow in medium to light, moderately fertile soil in full sun. Divide every few years in late winter to early spring to retain vigour. See ornamental grasses cultivation

Propagation

Propagate by division in late winter or early spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Low Maintenance
  • Flower borders and beds

Pruning

Cut all dead growth back in late winter or early spring before growth begins

Pests

Generally pest-free

Diseases

Generally disease-free