• AGM plants

    AGM plants have been through a rigourous 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

Stipa tenuissima

Mexican feather grass

Mexican feather grass

© � RHS 1997

  • Other common names Mexican feather grass
    Texas needle grass

  • Synonyms Nassella tenuissima
    Nassella tenuissima 'Pony Tails'

    Stipa tenuifolia misapplied
    Stipa tenuissima 'Pony Tails'

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  • 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

  • Family Poaceae / Poaceae

  • Species S. tenuissima is a deciduous grass to 60cm, forming a compact upright tuft of thread-like leaves, with narrow, arching, feathery flowering panicles in summer

  • Plant range USA to S America


  • Foliage Deciduous

  • Habit Tufted



  • Full Sun

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

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHAcid, Alkaline, Neutral


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in medium to light, moderately fertile soil in full sun

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

Suggested planting locations and garden types Flower borders and beds Low Maintenance Architectural City & Courtyard Gardens Cottage & Informal Garden

How to care

Pruning Leaves can be cut back when they die off in late autumn

Pests Generally pest free

Diseases Generally disease free

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