Symphytum uplandicum (Comfrey)
Botanical Information
Family | Boraginaceae |
Genus | Symphytum |
Species | uplandicum |
Category | Perennials |
Details
USDA Hardiness Zone | 4 - 7 |
USDA Hardiness Ref. | |
Canadian Hardiness Zone | 2a - 6b |
Canada Hardiness Ref. | |
RHS Hardiness Zone | H5 - H7 |
RHS Hardiness Ref. | |
Temperature (°C) | -34 - (-15) |
Temperature (°F) | -30 - 5 |
Height | 60 - 120 cm |
Spread | 60 - 90 cm |
Growth | Fast |
Flowering Period | May, June |