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Environmental Health

Invasive plants

Find out how to deal with Japanese Knotweed and Giant Hogweed.

Japanese Knotweed

  • heart shaped leaves
  • red streaks or spots on leaves
  • stems 2cm to 3cm tall

Damage caused by Japanese Knotweed

Underground stems cause damage to paths, drains and building foundations.

Treating Japanese Knotweed

  • use a weed specialist.
  • don't try to dig it out. The plant needs to be completely removed. If you leave any part of the plant it might spread. 
  • spray it with a herbicide to treat Japanese Knotweed.
  • don't put it in your brown bin. 

Removing Japanese Knotweed

To remove Japanese Knotweed, please contact the Environmental Health department:

Phone: 0141 577 3782

Email: environmentalhealth@eastrenfrewshire.gov.uk

Giant Hogweed

  • large green leaves with jagged edges
  • white flowers
  • thick bristly stems
  • stems up to 5m high

Damage caused by Giant Hogweed

The sap of the plant can cause damage if it touches your skin.

It can cause blistering, severe sunburn and sensitivity to sunlight. This can be a lifelong condition.

Treating Giant Hogweed

  • don't touch the plant and keep children away.
  • spray it with a herbicide to treat Giant Hogweed. Make sure you cover your hands and eyes.
  • do not put Giant Hogweed in your brown bin. 

Removing Giant Hogweed

You must not try to remove Giant Hogweed yourself. Please contact Scottish Natural Heritage for advice.


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