• 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

Citrus × aurantium (F)

Seville orange

Seville orange

© RHS

  • Other common names Seville orange
    bigarade

    bitter orange
    marmalade orange
    sour orange

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  • Synonyms Citrus bigaradia
    Citrus grandis var. kotokan

    Citrus hybrida
    Citrus kotokan
    Citrus myrtifolia
    Citrus natsudaidai
    Citrus reshni
    Citrus × aurantium subsp. myrtifolia
    Citrus × aurantium var. myrtifolia

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  • Family Rutaceae

  • Genus Citrus are typically evergreen shrubs or trees, frequently spiny, with simple, leathery, aromatic leaves, usually with winged stalks, and often fragrant white or pink-tinged flowers, followed by large, juicy fruits

  • Details C. x aurantium is a spiny tree, with rounded crown and mid green leaves 7-10cm long. From late spring to summer it bears fragrant white flowers 2cm across singly, in pairs or clusters that are followed by slightly flattened-spherical, red-tinted orange fruit 5-7cm in diameter

  • Plant range SE Asia

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Flower

  • 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)

    H3

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Clay

    Clay

  • Sand

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Clay, Sand

  • pHAcid, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Citrus cultivation - grow outdoors in full sun in frost-free areas with a well-drained, neutral or acidic soil. Under glass grow in loam-based potting compost in full light at minimum of 3-5°C

Propagation Propagate by seed (seedlings will not come true to type) or semi-ripe cuttings

Suggested planting locations and garden types Architectural City & Courtyard Gardens Patio & Container Plants

How to care

Pruning Pruning group 1

Pests Can get citrus red spider mite and glasshouse red spider mite, soft scale and fluted scale, aphids, caterpillars and mealybugs under glass

Diseases Generally disease free

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