Home » Invaders » Terrestrial Invasive Plants » Himalayan Balsam

Common Buckthorn
Rhamnus cathartica

Dog Strangling Vine (Vincetoxicum rossicum) photo by Ken Towle
Dog-Strangling Vine
Cynanchum rossicum and Cynanchum louisae

Garlic Mustard
Alliaria petiolata

Giant Hogweed (Heracleum mantegazzianum) photo by  Karen Rimmer
Giant Hogweed
Heracleum mantegazzianum

Himalayan Balsam (Impatiens glandulifera) photo by Jan Samanek, State Phytosanitary Administration
Himalayan Balsam
Impatiens glandulifera

Invasive Ground Covers

Invasive Honeysuckles

Invasive Phragmites (Phragmites australis subsp. australis) photo by Wasyl Bakowsky
Invasive Phragmites
Phragmites australis subsp. australis

Japanese Barberry
Berberis thunbergii

Japanese Knotweed
Reynoutria japonica var. japonica

Japanese Stilt Grass
Microstegium vimineum

Pueraria montana

Miscanthus sinensis & M. sacchariflorus

Purple Loosestrife
Lythrum salicaria

Wild Chervil
Anthriscus sylvestris

Wild Parsnip
Pastinaca sativa

Winged Euonymus
Euonymus alata

Himalayan Balsam
Impatiens glandulifera

Himalayan balsam is an annual herb, native to the western Himalayas. In the early 1800s it was introduced to many parts of Europe, New Zealand and North America as a garden ornamental. Himalayan Balsam has an orchid shaped flower resembling a British policeman’s helmet, which gave rise to its other common name of “Policeman’s helmet”.

Himalayan balsam can completely cover an area and crowd out native vegetation. Mature seed capsules explode when touched and can eject seeds as much as 5 m from the parent plant, giving it the alternate common name of “Touch-Me-Not plant”. It is mostly found in riparian areas, especially river edges and wetlands.


Since its introduction to parts of North America, Europe and New Zealand, himalayan balsam has been successful in escaping cultivation and invading natural areas. In Canada, it has been reported in eight provinces including British Columbia, Manitoba, Ontario, Quebec, Nova Scotia, New Brunswick, Prince Edward Island and Newfoundland. It is also naturalized in the United States.

Impacts of Himalayan Balsam

  • Creates dense stands that prevent native plants from establishing and reduce biodiversity and ecological value of land.
  • Prolific nectar producer, drawing pollinators away from surrounding native species.
  • Produces about 800 seeds per plant, which are released from capsules once they are disturbed or dry out.
  • An annual species that can aggressively replace native perennial plants along river banks, leading to soil erosion.

How to Identify Himalayan Balsam

  • Stems are hollow and smooth with purple to reddish colour. Able to grow 1 to 3 metres tall.
  • Leaves are 6-15 cm long and are widest in the middle with sharply toothed edges.
  • Flowers have 5 pink, white or purple petals, with 5-10 flowers on each stem.
  • Seeds are produced in capsules 1.5-3.5 cm long with up to 16 seeds inside. Mature seed capsules explode when touched, launching seeds in all directions up to 5m away.
  • Looks similar to Ontario’s native Jewelweed (Impatiens capensis), which is a related species with yellow-orange flowers.

What You Can Do

  • Learn how to properly identify Himalayan balsam and how to prevent accidentally spreading this invasive species.
  • Avoid using invasive plants in gardens and landscaping.
  • Purchase non-invasive plants from reputable horticultural suppliers.
  • Learn how to control invasive plant species on your property. Do not dispose of invasive plants in the compost pile – discard them in the regular garbage.
  • When hiking, reduce the spread of invasive plants and seeds by staying on trails and keeping pets on a leash.
  • If you find himalayan balsam or other invasive species in the wild, please contact the Invading Species Hotline at 1-800-563-7711, or report a sighting online.

Other Resources

OFAH/OMNR Invading Species Awareness Program. (2012). Himalayan Balsam. Retrieved from: http://www.invadingspecies.com. This factsheet may be reproduced for non-commercial purposes.

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