• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Cortaderia selloana

pampas grass

  • Other common names pampas grass

  • Synonyms Cortaderia selloana 'Alba'
    Cortaderia selloana 'Argentea'

    Arundo selloana
    Gynerium argenteum
    Cortaderia argentea

    see more
  • Family Poaceae

  • Genus Cortaderia are robust evergreen grasses forming large, compact tufts of narrowly linear, rough-edged leaves, with erect stems bearing dense silvery or pink-tinged flower panicles which are excellent for drying

  • Details C. selloana is a densely tufted, clump-forming, perennial grass, 2.5-3m high and 1.8m or more wide, with evergreen, arching, sharply toothed, blue-green leaves, to 2.5m or more long, and erect stems with pyramidal to oblong plume-like panicles, 45-90cm long, of glistening silver-white spikelets about 15mm long and often flushed with pink or purple, in late summer and early autumn

  • Plant range Temp. S America

Characteristics

  • Foliage Evergreen

  • Habit Tufted

  • 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)

    H6

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing or North-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in fertile, deep, well-drained soil in full sun, and cover with a deep dry mulch to protect plants from frost in their first winter; choose planting positions carefully, because they need plenty of space, because of the sharp leaf edges, and because seedlings can be invasive; for more advice, see ornamental grasses cultivation

Propagation Propagate by seed, sown at 13-18°C in spring, or by division in late spring

Suggested planting locations and garden types Cut Flowers Flower borders and beds Hedging & Screens Drought Resistant Coastal Gravel Garden Prairie Planting Architectural Cottage & Informal Garden

How to care

Pruning Cut and comb out the last year's flower stems and dead leaves in late winter or early spring; wear gloves as protection from the sharp leaf edges

Pests Generally pest-free

Diseases Generally disease-free

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