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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.
Giant hogweed (Heracleum mantegazzianum) is tall with thick bristly stems that are often purple-blotched. It is in the same family as cow parsley but cow parsley has much finer, fern-like foliage and generally flowers from April to June, whereas giant hogweed tends to flower later in June and July.
Giant hogweed (Heracleum mantegazzianum) is tall with thick bristly stems that are often purple-blotched. It is in the same family as cow parsley but cow parsley has much finer, fern-like foliage and generally flowers from April to June, whereas giant hogweed tends to flower later in June and July.
Jul 8, 2020 · Do not attempt to tackle giant hogweed that's come into bloom: a single flower stem can carry as many as 5,000 seeds that will spread everywhere when the plant falls. If you've found a giant hogweed that's blooming in your garden, call the environmental service of your council.
Aug 22, 2024 · Giant hogweed is biennial, so forms a basal clump of leaves in its first year and then flowers and sets seed in its second year. Removing it by hand requires full protective clothing, to stop any sap from being in contact with the skin.
- BBC Gardeners' World Magazine
Giant hogweed (Heracleum mantegazzianum) is an umbellifer (member of the cow-parsley family), and its flowering stems are typically 2-3 m in height bearing flower heads up to 80cm across. The lower leaves are often 1m more in size and distinctively spiky.
Giant hogweed is an immensely tall umbellifer (member of the carrot family) that displays large, white, umbrella-like clusters of flowers. Its hollow stem is ridged and purple-spotted, and its leaves are large and divided.
