Perennials, Weeds > Heracleum > Heracleum mantegazzianum > Heracleum mantegazzianum
Heracleum mantegazzianum
Giant Hogweed
Mike's
Opinion
"
This introduced escaped garden ornamental should be approached with caution since its sap is phototoxic.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Apiaceae |
| Genus |
| Heracleum |
| Species |
| mantegazzianum |
| Category |
| Perennials, Weeds |
| USDA Hardiness Zone |
| 3 - 6 |
| Canadian Hardiness Zone |
| 1a - 5b |
| RHS Hardiness Zone |
| H7 |
| Temperature (°C) |
| -40 - (-21) |
| Temperature (°F) |
| -30 - (-5) |
| Height |
| 3 m |
| Spread |
| 1 m |
Photographs
Cultivars
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Description and Growing Information
Flowering Period
| Landscape |
| Should not be used in the landscape since it can cause very severe skin burns if the sap contacts the skin and is activated by sunlight. |
| Growth |
| Fast |
| Habitat |
| Moist rich soils, often in partial shade on the edges of woodlands. |
| Propagation |
| Easily by seed. |
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