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Euphorbia milii AGM

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© RHS 1999

Characteristics

Plant type

Shrub, Conservatory/Greenhouse or Houseplant

Habit

Bushy

Toxicity

All parts are poisonous by ingestion; sap may irritate the skin

Resilience

Hardiness

H1b (heated greenhouse - subtropical)

Colour

Flower

Red and Yellow in Summer

Foliage

Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

10-20 years


Preferred common name

crown of thorns

Family

Euphorbiaceae


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

E. milii is a more or less evergreen shrub to 1m, with thorny, succulent branches, leathery obovate leaves and axillary clusters of very small yellow flowers with showy, bright red bracts

Other common names

  • Christ plant
  • Christ thorn

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or East-facing
  • Sheltered

Cultivation

Grow under glass in a mix of three parts loam based potting compost to one part grit in full light.Water sparingly when in growth applying a low nitrogen liquid fertiliser monthly. Keep dry in winter

Soil

  • Well-drained
  • Acid, Alkaline or Neutral
  • Sand, Chalk or Loam

Propagation

Propagate by seed sown as soon as ripe at 15 to 20 °C

Suggested planting locations and garden types

Sub-tropical, Low Maintenance or Patio/Container Plants


How to care

Pruning

Pruning group 6

Pests

Generally pest free

Diseases

May be subject to grey moulds