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To help continue the collection of this important data for the Biological Records Centre’s iRecord system WhatShed have created this interactive map that shows all the locations for Giant Hogweed sightings in the UK.
Jun 19, 2018 · Giant hogweed, the nasty invasive plant that’s currently in the news — experts discovered it for the first time in Virginia recently — has been found in scattered places in Ohio for a number of years, especially in Ashtabula County in the state’s far northeastern corner.
Jun 1, 2021 · Where am I likely to find giant hogweed? The plant is found throughout the UK, and more specifically, by river banks where the seeds are transported via the water.
- Charlotte Ikonen
Giant Hogweed (Heracleum mantegazzianum) is a towering and imposing plant that has become a growing concern across the UK. Originally hailing from the Caucasus Mountains in Central Asia, it was introduced to Britain as an ornamental plant during the 19th century.
- Identification
- Control of Giant Hogweed
- Acknowledgements
- References
- Photo Credits
Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. It is a member of the Apiaceae (Umbelliferae)family of plants, commonly known as the Carrot or Parsley family. It can live for several years but once it flowers and bears fruit it dies. Giant hogweed is hardy to zone 3 and prefers full sun and mo...
Gardeners, landscapers, surveyors, nurserymen and farmers should exercise caution around this plant. As was mentioned previously, the plant juices can cause phytophotodermatitis. If the plant sap comes in contact with the skin in the presence of sunlight, a severe rash and/or blistering can occur. Therefore, extreme caution should be taken when con...
The authors would like to thank Dr. Jörg Ochsmann, Dr. Mads A. Sorensen, and the USDA-APHIS office for their photo contributions. A special thank you is extended to Settillo Codispoti for allowing OSU Extension educators to learn more about giant hogweed at his farm in Pierpont, Ohio. Reviewers of this document included: Jeff Stachler, Weed Scienti...
Neilson, C., Ravn, P., Nentwig, W., & Wade, M. (2005). The Giant Hogweed Best Practice Manual. Horsholm, Denmark: Forest & Landscape Denmark. (Online). Retrieved August 2005. researchgate.net/publi...United States Department of Agriculture, Animal & Plant Health Inspection Service (2002). Giant Hogweed.(Online). Retrieved August 2005. aphis.usda.gov/lpa/pubs/fsheet_faq_notice/fs_phhgweed.pdf (n...Mayer, L. (n.d.). Comparison of Management Techniques for Heracleum mantegazzianum in North and Central Europe.(Online). Retrieved August 2005. horticulture.coafes.umn.edu/vd/h5015/00papers/mayer.h...King County Washington (2004). Best Management Practices for Giant Hogweed.(Online). Retrieved August 2005. dnr.metrokc.gov/wlr/LANDS/Weeds/pdf/hogweed-control.pdf (no longer available online).Figures 1, 4, 5, 6, 7, 8 and 9. Photos courtesy of David Marrison, OSU Extension.Figure 2. Photo courtesy of the USDA-APHIS.Figure 3. Photo reprinted with permission from Dr. Jörg Ochsmann, Germany.Figure 10. Photo reprinted with permission from Mads A. Sorensen, Denmark.Jun 20, 2024 · A new map from Whatshed.co.uk has pinpointed the UK's hotspots for the dangerous giant hogweed plant, as well as areas that are relatively free of it. London is a major hotspot for the toxic plant, particularly in the west of the city in Hounslow and Ealing, and around Stratford, Walthamstow, and Tottenham in the northeast.
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Jun 29, 2022 · Common names: giant hogweed, giant cow parsnip, cartwheel plant, the Hog. Scientific name: Heracleum mantegazzianum. Family: Apiaceae. Habitat: derelict gardens, neglected urban places and waste ground, on rubbish tips, roadsides and by streams and rivers. Flowering season: June and July.
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