• 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

Euphorbia ingens

candelabra tree

© RHS
  • Other common names candelabra tree

  • Family Euphorbiaceae

  • Genus Euphorbia can be annuals, perennials, shrubs or succulents, with milky sap and small flowers held within cupped, often colourful bracts

  • Details E. ingens is a fast-growing, succulent tree capable of reaching 15m, but is usually grown as a pot plant. The branching, leafless stems have four or five vertical ridges bearing small spines. Mature plants can produce greenish-yellow flowers at the branch tips, followed by dark red to purple fruit

  • Plant range S & E Africa

Characteristics

  • Foliage Evergreen

  • Habit Columnar/Upright

  • Toxicity All parts are highly toxic by ingestion

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • MoistureWell-drained

  • SoilLoam, Sand

  • pHNeutral, Alkaline, Acid

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread wider than 8 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow indoors in equal quantities of loam-based potting compost and grit in full light. Water moderately when in growth and keep dry in winter. In the growing season feed a low nitrogen liquid fertiliser 2 or 3 times. See cacti and succulent cultivation

Propagation Propagate by seed sown at 15-18ºC in early spring or stem cuttings in spring or early summer

Suggested planting locations and garden types Low Maintenance Patio & Container Plants

How to care

Pruning Can be cut back to restrict size

Pests May be attacked by mealybugs, glasshouse whitefly and glasshouse red spider mite

Diseases May suffer from powdery mildews and root rots

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