![]() This page looks at options for gardeners when giant hogweed is a problem. Details can be found on the Non-native Species Secretariat (search 'Heracleum'). Their occurrence is monitored and it appears that they are reported to be continuing to spread and can be found in every part of the British Isles. Unfortunately they quickly escaped from cultivation with the first naturalised (‘wild’) population recorded in Cambridgeshire in 1828, and are now widely naturalised as invasive species throughout much of Britain and Europe. They were soon introduced into the horticultural trade and being aesthetically impressive plants, were widely planted in ornamental gardens throughout Britain. The earliest documented reference to their introduction into Britain that has been traced is from the Royal Botanic Gardens Kew Seed List of 1817 where giant hogweed, under the name of Heracleum giganteum was listed among seeds supplied to Kew by the Russian Gorenki Botanic Gardens. The giant hogweeds were introduced into Britain and Europe from the Caucasus Mountains in the nineteenth century. Heracleum sphondylium can support lots of pollinators, including beetles, flies, hoverflies, bees and wasps. It can cause rashes and other skin complaints but reactions tend not be as severe as with the larger species. It can grow to six foot or so when in flower but is nevertheless a much smaller plant than giant hogweed. 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. However, when tested all these had high levels of furanocoumarins (the chemicals which cause burning by making the skin sensitive to sunlight) and so all pose a risk to public health. ![]() 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. ![]() The giant hogweeds are usually referred to by one name, Heracleum mantegazzianum. 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. Malvern Autumn Show - 22–24 September 2023Īlthough an impressive sight when fully grown, giant hogweed is invasive and potentially harmful.RHS Garden Wisley Flower Show - 5–10 September 2023.RHS Garden Rosemoor Flower Show - 18–20 August 2023.RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.RHS Hampton Court Palace Garden Festival - 4–9 July 2023.Local agents estimate that overall commercial lease prices have increased by about 25% in the past 12 to 24 months, thanks to a spike in demand. That’s changing as East Hampton finds itself in the midst of an unprecedented retail boom, driven by the spending power of a population that’s become less and less seasonal. While record-topping residential real estate sales are commonplace in the Hamptons, commercial properties here have not historically seen the same demand. At $4,400 per square foot, it wasn’t just a big deal locally: That number also exceeds the average rates for retail space in prime areas of Hong Kong, Milan, London, Paris, Tokyo and even Manhattan’s Upper Fifth Avenue (49th to 60th streets), where, according to a report by Cushman & Wakefield, an annual average rent of $2,000 per square foot made it the world’s most expensive shopping street in 2022. In April, Bernard Arnault, chairman and chief executive officer of LVMH Moet Hennessy Louis Vuitton SE, purchased an East Hampton boutique for $22 million-a new record price for commercial real estate in the tony beachside community.
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