Helleborus orientalis 'Black Strain'
Botanical Information
| Family | Ranunculaceae |
| Genus | Helleborus |
| Species | orientalis |
| Cultivar | 'Black Strain' |
| Category | Perennials |
Details
| USDA Hardiness Zone | 6 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 5a - 6a |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H6 - H7 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -23 -(-18) |
| Temperature (°F) | -10 - 0 |
| Flowering Period | April |
Description and Growing Information
Photographs
