About
Didierea trollii is a spiny, succulent shrub or small tree from the semi-arid thorn scrub of southern Madagascar, forming a distinctive branching plant with clusters of succulent leaves and small flowers. One of the Madagascar 'octopus trees', it is a remarkable and unusual specimen for a heated greenhouse or succulent collection.
About the genus
Didierea are spiny, succulent shrubs and small trees from the semi-arid regions of Madagascar, forming the unique spiny forest (spiny thicket) vegetation. They are grown as remarkable, unusual specimens in heated glasshouses and succulent collections.
Growing conditions
SunlightFull shade, Partial shade
Soil typeLoam, Sand
Soil pHAcid, Neutral
Soil moistureMoist but well-drained
AspectWest-facing, East-facing, South-facing
ExposureSheltered
UK hardinessH3
Plant details
Plant typeConservatory Greenhouse, Ferns
HabitBushy
FoliageEvergreen
Height4-8 metres
Spread2.5-4 metres
Time to full height20-50 years
Suggested usesArchitectural, City and courtyard gardens, Coastal, Cottage and informal garden
Native toNew Zealand, Chatham Is.
Care notes
CultivationGrow outdoors in a moist but well-drained humus-rich soil. In hot, dry summers water the stem but avoid watering the crown in winter. Will grow without winter protection only in milder areas
PruningDead or damaged fronds may be removed as necessary
PropagationPropagate by sowing spores as soon as ripe
Pest resistanceGenerally pest-free outdoors
Disease resistanceGenerally disease-free outdoors