Vernonia gigantea (Giant Ironweed)
Botanical Information
| Family | Asteraceae |
| Genus | Vernonia |
| Species | gigantea |
| Category | Perennials, Wildflowers & Weeds |
| Origin | Native to the Eastern United States. |
Details
| USDA Hardiness Zone | 4 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 2 - 5a |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H7 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -35 - (-29) |
| Temperature (°F) | -30 - (-20) |
| Height | 150 - 240 cm |
| Spread | 90 - 180 cm |
| Growth | Medium |
| Flowering Period | August, September |
Description and Growing Information
| Cultivation | Grow in any soil in full sun. |
| Notable Specimens | The A.M. Cuddy Gardens, Strathroy, Ontario, Canada. |
| Leaf Description | Lanceolate to lanceolate-ovate leaves featuring irregularly serrated margins on them and measuring at 25 cm. |
| Flower Description | Each individual flower features dense, fluffy, rose-purple disks, and blooms in corymbose cymes. |
Photographs
