About
Rhaphithamnus spinosus, the blue molle, is a spiny, evergreen shrub or small tree from South America producing the characteristic pairs of spines, small, glossy leaves and tubular, blue-violet flowers of the genus. A rewarding and ornamental plant for a frost-free, sheltered garden.
About the genus
Rhaphithamnus are spiny, evergreen shrubs and small trees from South America with small, glossy leaves, tubular flowers and berry-like fruits. Grown in frost-free, sheltered gardens.
Growing conditions
SunlightFull sun, Partial shade
Soil typeClay, Loam, Sand
Soil pHAcid, Neutral
Soil moistureMoist but well-drained
AspectSouth-facing, West-facing
ExposureSheltered
UK hardinessH3
Plant details
Plant typeShrubs
HabitBushy
FoliageEvergreen
Height1.5-2.5 metres
Spread1-1.5 metres
Time to full height5-10 years
Suggested usesCity and courtyard gardens, Mediterranean climate plants
Native toChile
Care notes
CultivationUnder glass, grow in ericaceous potting compost with additional leafmould, in bright, filtered light. When in growth, water freely and apply a balanced liquid fertiliser monthly; water sparingly in winter. Outdoors grow in acid to neutral, moist but well-drained soil in full sun or partial shade, preferably against a warm wall
PruningSee pruning group 8
PropagationPropagate by sowing seed in containers in a cold frame as soon as ripe. Protect germinating seedling from frost. Take semi-ripe cuttings in summer
Pest resistanceGenerally pest-free
Disease resistanceGenerally disease-free