Betula ermanii 'Polar Bear' (Polar Bear or Erman's Birch)
Botanical Information
Family | Betulaceae |
Genus | Betula |
Species | ermanii |
Cultivar | 'Polar Bear' |
Category | Woody |
Type | Shrub (deciduous) |
Pronunciation |
Details
USDA Hardiness Zone | 3 |
USDA Hardiness Ref. | |
Canadian Hardiness Zone | 1 |
Canada Hardiness Ref. | |
RHS Hardiness Zone | H7 |
RHS Hardiness Ref. | |
Temperature (°C) | -40 - (-35) |
Temperature (°F) | -40 - (-30) |
Height | 25 m |
Growth | Slow |
Description and Growing Information
Landscape | An excellent specimen tree. |
Propagation | Propagate by seed, with light present for germination, although seeds may not come true. Can also be propagated through side-veneer grafts in late winter. |
Cultivation | Very hardy, but prefers a deep, well-draining loam soil. |
Pests | Prone to attack by several bracket fungi, as well as mildew and birch rust. |
Habitat | Horticultural origin. |