• 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

Elymus magellanicus

Magellan rye grass

Magellan rye grass

© RHS 2002

  • Other common names Magellan rye grass
    Magellan wheatgrass

    blue wheatgrass

    see more
  • Synonyms Agropyron magellanicum
    Agropyron pubiflorum

    Leymus magellanicus

    see more
  • Family Poaceae

  • Genus Elymus can be tufted or rhizomatous perennial grasses, with linear, deciduous leaves, sometimes attractively coloured, and flattened flower spikes in summer and autumn

  • Details E. magellanicus is a tufted deciduous grass to 60cm in height, forming a dense clump of vivid blue linear leaves to 5cm in length, with small, lax flower spikes in summer

  • Plant range South America


  • Foliage Deciduous

  • 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)




  • Full Sun

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

  • Exposure Exposed or Sheltered


  • Loam


  • Chalk


  • Sand


  • Clay


  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHAcid, 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 Easy to grow in most moist, well-drained fertile soils in full sun

Propagation Propagate by seed sown in situ in spring or autumn or by division in early summer

Suggested planting locations and garden types Flower borders and beds Low Maintenance City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants Rock Garden

How to care

Pruning Cut back to ground level in late autumn

Pests Generally pest free

Diseases May be affected by rust and powdery mildews

Advertise here

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.