• 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

Cymbopogon citratus

lemon grass

lemon grass

© RHS

  • Other common names lemon grass
    serai

    squinant

    see more
  • Synonyms Andropogon citratus

  • Family Poaceae

  • Genus Cymbopogon are sturdy, aromatic, tufted, evergreen, perennial grasses with linear to lance-shaped, mid- to bluish-green leaves and many-branched flower sprays. They contain essential oils that have medicinal, culinary and cosmetic uses

  • Details C. citratus is a densely-tufted, clump-forming, evergreen grass with hollow, cane-like stems and erect to arching, narrow, strongly lemon-scented, pale blue-green leaves up to 90cm long. Flowers are green and pinkish brown, in loose, branched sprays in late summer and autumn, but rarely appear under glass

  • Plant range S India Sri-Lanka

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Leaf

  • 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)

    H1B

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilLoam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow under glass in loam-based compost in full light with moderate humidity

Propagation Propagate by seed sown at 13-18°C in early spring, or by division in late spring. Fresh shoots sold for cooking will often root successfully

Suggested planting locations and garden types Patio & Container Plants Sub-tropical

How to care

Pruning No pruning needed

Pests Generally trouble free

Diseases Generally trouble free

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