• English (en)
  • español (es)
  • italiano (it)
  • 简体中文 (zh-cn)
  • Cymraeg (cy)
  • More coming soon!

Announcements

Want to know more about what we do? Have a look at our features (PDF)

Giant hogweed

View or download sightings meta-data

Heracleum mantegazzianum

Giant hogweed superficially resembles native hogweed. Giant hogweed is an enormous plant with a large flower head (up to 80 cm across) and deeply serrated leaves. Plants may grow to more than 5 m (16 ft) tall, dwarfing native plants, shrubs and even trees! Stems are hollow tubes covered in sharp bristles. Be very careful around giant hogweed as touching any part of the plant can cause painful blistering of the skin that may pop up again years later.

Giant hogweed may be found individually or in bigger patches, particularly along riverbanks. Found throughout the UK, giant hogweed is particularly abundant in northern England and southern Scotland.

Hunt down Giant hogweed!

Make a sighting! Read the description above — think you might have seen it? Snap it and send it (use our mobile app if you have a supported smartphone) — don't worry if you're not really sure; an expert will try and verify it by the picture.

Most recent

Giant hogweed on 2012-06-04 08:00:00

Giant hogweed on 2012-06-04 08:00:00

Sighting locations

Sighting history