Berberis thunbergii
Japanese Barberry, Thunberg's Barberry, Red Barberry
Family |
Berberidaceae |
Genus |
Berberis |
Species |
thunbergii |
Category |
Woody |
Type |
Shrub (deciduous) |
Pronunciation |
USDA Hardiness Zone |
4 |
Canadian Hardiness Zone |
2 - 5a |
RHS Hardiness Zone |
H7 |
Temperature (°C) |
-35 - (-29) |
Temperature (°F) |
-30 - (-20) |
Height |
60 - 240 cm |
Landscape |
Works well in gardens and as borders and groundcover. |
Cultivation |
Will thrive in any soil type that is not waterlogged, and should be grown in full sun. |
Growth |
Medium |
ID Characteristic |
B. thunbergii is most readily distinguished by the flowers being produced in umbels, not racemes. |
Pests |
The bacteria Pseudomonas berberidis may cause black spots on leaves, and the berberry aphid (Liosomaphis berberidis) may also be a problem. |
Bark/Stem Description |
Stems are angular, dark red and grooved, with simple spines. |
Leaf Description |
The leaves are green to blue-green, very small, spatula to oval shaped, 12-24 mm long and 3-15 mm broad; they are produced in clusters of 2-6 on a dwarf shoot in the axil of each spine. |
Flower Description |
The flowers are pale yellow, 5-8 mm diameter, produced in drooping 1-1.5 cm long umbrella-shaped clusters. |
Fruit Description |
The edible fruit is a glossy bright red to orange-red, ovoid berry 7-10 mm long and 4-7 mm broad, containing a single seed. They mature during late summer and autumn and persist through the winter. |
Notable Specimens |
The Gardens of Fanshawe College, London, Ontario, Canada. |
Propagation |
Propagate by seed or by cuttings. |