About
Euphorbia ammak is a large, tree-like succulent from Arabia producing deeply ribbed, candelabra-like stems armed with spines. A dramatic architectural plant for a heated greenhouse, conservatory or frost-free garden.
About the genus
Euphorbia, the spurges, are an extraordinarily diverse genus of annuals, perennials, shrubs and succulents producing milky sap and small flowers held within cupped, often brightly coloured bracts. They range from tiny alpine cushions and giant tree-like succulents to familiar garden perennials and houseplants.
Growing conditions
SunlightFull sun
Soil typeLoam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureWell-drained
AspectSouth-facing, West-facing
ExposureSheltered
UK hardinessH2
Plant details
Plant typeCactus Succulent, Houseplants, Conservatory Greenhouse
HabitColumnar upright
FoliageEvergreen
Height8-12 metres
Spread4-8 metres
Time to full height10-20 years
Suggested usesArchitectural, Houseplants, Patio and container plants
Native toNE Africa
ToxicityHumans/Pets: IRRITANT to skin/eye, harmful if eaten. Wear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
CultivationGrow indoors in equal quantities of peat-free, 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 houseplant cacti and succulent cultivation for more details.
PruningNo pruning required but can be cut back to restrict size
PropagationPropagate by seed sown at 15-18°C in early spring or stem cuttings in spring or early summer
Pest resistanceMay be susceptible to mealybugs, glasshouse whitefly and glasshouse red spider mite
Disease resistanceMay be susceptible to powdery mildews and root rots