• 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

Glyceria maxima var. variegata (v)

variegated reed sweet-grass

variegated reed sweet-grass

© RHS 1999

  • Other common names variegated reed sweet-grass

  • Synonyms Glyceria aquatica variegata
    Glyceria spectabilis 'Variegata'

  • Family Poaceae

  • Genus Glyceria are vigorous, spreading, moisture-loving or aquatic, rhizomatous perennial grasses, with narrowly strap-shaped leaves and green or purple-tinged flowering panicles in late summer

  • Details G. maxima var. variegata is a strong-growing rhizomatous perennial forming extensive stands of narrowly strap-shaped leaves striped with cream and sometimes tinged with pink, and with purplish-green flowering panicles in late summer


  • Foliage Deciduous

  • Habit Suckering

  • 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 West-facing

  • Exposure Sheltered or Exposed


  • Sand


  • Clay


  • Loam


  • MoisturePoorly-drained

  • SoilSand, Clay, Loam

  • pHNeutral, Acid, Alkaline


  • Ultimate height 0.5-1 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in any reliably moist, fertile soil or in water up to 15cm deep, in full sun. Divide every few years to prevent congestion; can be invasive

Propagation Propagate by division in spring

Suggested planting locations and garden types Low Maintenance Wildlife Gardens

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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