Sorbus dunnii (Dunnii Mountain Ash)


Botanical Information

FamilyRosaceae
GenusSorbus
Speciesdunnii
CategoryWoody
TypeTree (deciduous), Shrub (deciduous)

Details

USDA Hardiness Zone7
USDA Hardiness Ref.
Canadian Hardiness Zone6b
Canada Hardiness Ref.
RHS Hardiness ZoneH6
RHS Hardiness Ref.
Temperature (°C)-15
Temperature (°F)5
Height20 m
GrowthMedium
Flowering PeriodApril, May

Description and Growing Information

LandscapeWonderful specimen plant.
PropagationPropagate by softwood cuttings in spring and early summer, or by seed (although this may be complicated by dormancy).
CultivationGrow in full sun in a fertile, moisture retentive but well-drained soil that is humus rich. May suffer badly in drought, so should be watered in dry conditions.
PestsAphids may be a nuisance, as well as red spider mite and scales. Rust fungus, fireblight and root rots should also be watched for.
Notable SpecimensWestonbirt, The National Arboretum, Tetbury, Gloucestershire, England.
Flower/Leaf Bud DescriptionBuds are large, with overlapping scales.
Flower DescriptionFlowers are white, appearing in terminal corymbs, with 5 petals.
Fruit DescriptionFruis is a pome that is 0.5 - 1 cm in diameter. with 2-5 cells containing 1-2 seeds.

Photographs