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Himalayan balsam

Impatiens glandulifera

Himalayan balsam may look pretty, but it’s causing serious damage to our rivers and woodlands. 

Originally introduced to the UK in 1839 as a garden ornamental, this invasive plant has escaped into the wild—and it’s thriving in the damp conditions along riverbanks and in shaded woodland.

Himalayan balsam flowers and seed pods.
Himalayan balsam stems and bare earth below.
Stuart Walker Photography

🌿 Why it’s a problem

In ecologically sensitive areas like the Eden catchment, Himalayan balsam is more than just a nuisance:

  • It smothers native plants, outcompeting them for light and space until they disappear (see image - bare earth between stems, no other plants can thrive as tall Himalayan balsam plants block the light).
  • It leaves riverbanks bare in winter when it dies back, increasing the risk of erosion.
  • It spreads rapidly, with lightweight seeds carried easily by wind, water, and even unsuspecting walkers and pets.
Did you know?

Balsam can grow up to 2.5m tall!

Did you know?

Each plant can produce up to 800 seeds in seed pods – that’s a lot of new plants growing next year

Did you know?

In late summer, the seed pods explode, shooting their seeds up to 7m away!

🌱 Get Bashing!

Himalayan balsam has shallow roots, making it easy to pull up and crush so it doesn’t regrow. The best time to do this is late spring to summer, before the seed pods develop. Whether you're out for a walk or joining a community event, every plant pulled makes a difference!

Download our balsam bashing guide and watch Ali demonstrate the technique.

Bash the Balsam - for kids!

We’ve produced a colourful book for children that includes a poem, Adventurous Salmon game and lots of information about Himalayan balsam – what it is, where it came from, why it is such a problem and what can be done about it … and St. Bede’s Catholic Primary in Carlisle has made a film of the book!

Bash the Balsam - for kids!

We’ve produced a colourful book for children that includes a poem, Adventurous Salmon game and lots of information about Himalayan balsam – what it is, where it came from, why it is such a problem and what can be done about it … and St. Bede’s Catholic Primary in Carlisle has made a film of the book!

Read Bash the Balsam online book
Graphic of the front cover of Bash the balsam book. The title reads: