Michael's Opinion
I admire the texture and form of this plant but have lived to regret its inclusion in the landscape where it has become a garden thug, even growing under concrete walkways to adjoining planting beds; control, nuclear bombs.
Botanical Information
| Family | Asteraceae |
| Genus | Petasites |
| Species | japonicus |
| Variety | giganteus |
| Category | Perennials |
Details
| USDA Hardiness Zone | 5 - 9 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 4a - Requires cool season protection under glass. |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H3 - H7 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -29 -(-1) |
| Temperature (°F) | -20 - 30 |
| Height | 120 - 180 cm |
| Spread | 90 - 120 cm |
| Flowering Period | March, April, May |
Description and Growing Information
| General Description | This plant is a very aggressive spreader and prefers sunny, moist areas. |
| Landscape | Use with caution since it can travel quite far in the landscape where conditions are ideal and although ornamental use with extreme caution. |
| Notable Specimens | The Gardens of Fanshawe College, London, Ontario, Canada. |
| Leaf Description | This plant has deep green rounded leaves. |
