About
Eucalyptus regnans, the Australian mountain ash, is one of the tallest flowering plants on Earth � a very large evergreen tree capable of reaching 90 m tall, rivalling the giant redwoods � suitable only for the largest gardens or parkland. Tapering, green, aromatic juvenile and adult foliage is produced on a trunk with greyish-brown, persistent bark below and cream, green and grey, strip-shedding bark on branches above. White flowers appear in autumn.
About the genus
Eucalyptus are evergreen trees or large shrubs, most native to Australia, often fast-growing with attractive, often peeling or mottled bark, aromatic foliage and clusters of fluffy white, yellow or red flowers. Grown as specimen trees, hedges or coppiced for foliage in gardens and parks.
Growing conditions
SunlightFull sun
Soil typeClay, Loam, Sand
Soil pHAcid, Neutral
Soil moistureMoist but well-drained, Poorly-drained, Well-drained
AspectSouth-facing, West-facing, East-facing
ExposureSheltered
UK hardinessH5
Plant details
Plant typeTrees
HabitSpreading branched
FoliageEvergreen
Height8-12 metres
Spread4-8 metres
Time to full height10-20 years
Suggested usesArchitectural, Coastal, Cottage and informal garden
Native toSE Australia
FragranceFoliage
Care notes
CultivationGrow in slightly acidic soil that does not dry out with full sun and shelter from cold, drying winds
PruningPruning group 1 or Pruning group 7 for the best display of juvenile foliage
PropagationPropagate by seed at 13-18°C in spring and summer
Pest resistanceMay be susceptible to eucalyptus gall wasp and eucalyptus sucker
Disease resistanceMay be susceptible to silver leaf, oedema and honey fungus