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   Is hogweed a native plant?

   • There is also a native hogweed, Heracleum sphondylium, which will be a familiar plant to gardeners and those who like to go walking in the UK. It can grow to six foot or so when in flower but is nevertheless a much smaller plant than giant hogweed.

   Giant hogweed / RHS

   www.rhs.org.uk/weeds/giant-hogweed

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   Is giant hogweed invasive?

   • Giant hogweed (Heracleum mantegazzianum) is a close relative of cow parsley originally from Southern Russia and Georgia. It can reach over 3m (10ft) in height. Although this striking plant can be attractive in certain situations, most gardeners will want to eradicate it, as it is potentially invasive and the sap can cause severe skin burns.

   Giant hogweed / RHS

   www.rhs.org.uk/weeds/giant-hogweed

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   Is giant hogweed poisonous?

   • Giant hogweed grows to a huge size and forms dense, impenetrable stands, particularly along riverbanks but also alongside roads and railway lines. This dominance out-competes native flowers and reduces species diversity. The plant produces a phototoxic sap, which in the presence of sunlight will cause serious skin burns.

   Giant Hogweed | Scottish Invasive Species Initiative

   www.invasivespecies.scot/giant-hogweed

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   Can giant hogweed cause photodermatitis?

   • Chemicals in the sap can cause photodermatitis or photosensitivity, where the skin becomes very sensitive to sunlight and may suffer blistering, pigmentation and long-lasting scars. The giant hogweeds are usually referred to by one name, Heracleum mantegazzianum.

   Giant hogweed / RHS

   www.rhs.org.uk/weeds/giant-hogweed

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   What is a giant hogweed?

   • The giant hogweeds are usually referred to by one name, Heracleum mantegazzianum. Research by RHS and other botanists shows that, while this is one of the species, there are as many as four other giant hogweeds at large in Britain some of which are biennial and others perennial.

   Giant hogweed / RHS

   www.rhs.org.uk/weeds/giant-hogweed

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   Can giant hogweed cause burns?

   • In short - the sap of giant hogweed can cause burns. It contains furocoumarin, which makes skin extremely sensitive to sunlight (phytophotodermatitis). If the sap gets onto your skin and it's then exposed to the sun, your skin can blister badly. Blistering can then recur over months and even years. This is known as phytotoxicity.

   Giant Hogweed: The Facts - Woodland Trust

   www.woodlandtrust.org.uk/blog/2022/06/giant-hogweed-facts/

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2. www.woodlandtrust.org.uk › 06 › giant-hogweed-factsGiant Hogweed: The Facts - Woodland Trust

   www.woodlandtrust.org.uk › 06 › giant-hogweed-facts

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   Jun 29, 2022 · You may have heard about the dangers of giant hogweed – a non-native invasive plant which can cause burns. So we’ve put together the facts for you, from identification to staying safe.

3. www.rhs.org.uk › weeds › giant-hogweedGiant hogweed / RHS

   www.rhs.org.uk › weeds › giant-hogweed

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   Although an impressive sight when fully grown, giant hogweed is invasive and potentially harmful. Chemicals in the sap can cause photodermatitis or photosensitivity, where the skin becomes very sensitive to sunlight and may suffer blistering, pigmentation and long-lasting scars.

4. Videos

   • 

     3:48

     youtube.com

     The invasive Giant Hogweed

     17 Oct 2024

     28 views

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     invasivespecies.ie

     Giant Hogweed Control and Solutions from INVAS Biosecurity | Invasive Species Specialists & Environmental Consultants

     27 May 2021

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     monroe.cce.cornell.edu

     Giant Hogweed

     1 Aug 2022

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5. blog.invasive-species.org › 2018/08/28 › giantGiant Hogweed: Biology, Impacts and Management – Invasive ...

   blog.invasive-species.org › 2018/08/28 › giant

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   Aug 28, 2018 · Giant hogweed is a leading invasive plant across Europe and North America, causing numerous ecological impacts as well as severe phototoxic reactions when coming into contact with skin (© Pexels)

6. www.invasivespecies.scot › giant-hogweedGiant Hogweed | Scottish Invasive Species Initiative

   www.invasivespecies.scot › giant-hogweed

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   Giant hogweed grows to a huge size and forms dense, impenetrable stands, particularly along riverbanks but also alongside roads and railway lines. This dominance out-competes native flowers and reduces species diversity.

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7. canalrivertrust.org.uk › giant-hogweedGiant hogweed | Invasive species - Canal & River Trust

   canalrivertrust.org.uk › giant-hogweed

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   Jul 17, 2024 · Although it closely resembles harmless cow parsley and our native (and harmless) common hogweed, don't let its pretty flower-like appearance throw you off. This dark-green giant contains sap that can burn skin when exposed to sunshine.

8. www.wildlifetrusts.org › wildflowers › giant-hogweedGiant hogweed - The Wildlife Trusts

   www.wildlifetrusts.org › wildflowers › giant-hogweed

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   Scientific name: Heracleum mantegazzianum. As its name suggests, giant hogweed it a large umbellifer with distinctively ridged, hollow stems. An introduced species, it is an invasive weed of riverbanks, where it prevents native species from growing.

9. www.rhs.org.uk › advice › profileGiant hogweed - RHS Gardening

   www.rhs.org.uk › advice › profile

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   Although an impressive sight when fully grown, giant hogweed is invasive and potentially harmful. Chemicals in the sap can cause photodermatitis or photosensitivity, where the skin becomes very sensitive to sunlight and may suffer blistering, pigmentation and long-lasting scars.