Giant hogweed (Heracleum mantegazzianum)
Care, watering, light and tips for Giant hogweed on Floravia.
Quick facts
- Family: Apiaceae
- Difficulty: Demanding
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Giant hogweed
Heracleum mantegazzianum, commonly known as Giant Hogweed, is a large perennial herbaceous plant that can grow up to 5 meters tall. It is characterized by its large lobed leaves and umbrella-shaped inflorescences with white flowers that can measure up to 50 cm in diameter. Although impressive in stature, this plant is highly invasive and its sap is phototoxic, causing severe burns upon skin contact and sun exposure, making its cultivation prohibited in many places and not recommended for ornamental gardens.
Native range
Caucasus region and Central Asia
Care tips
Caring for Heracleum mantegazzianum is not recommended due to its invasive nature and the severe health risks it poses. If encountered, it is advised not to touch it and to contact local authorities for its safe eradication. Handling requires full personal protective equipment to avoid contact with the sap. It is crucial to prevent its spread and report any sightings to invasive species control entities.
How to save a dying Giant hogweed
- Warning signs
- Wilting, yellowing, or black-spotted leaves. Stunted growth or soft stem.
- First aid
- Extreme caution! Wear gloves and eye protection. Carefully remove the plant, digging up the taproot. Do not cut it, it will resprout.
- What kills it
- Attempting to cut or prune without protection. Touching the highly phototoxic sap. Not completely removing the root.
- Can it be saved?
- Yes, with quick and safe action. Complete manual removal of the taproot is crucial before flowering.