22.8.2024

IAS heroes: Victories in the battle against Tromsø palm

Persian hogweed thrives in Tromsø and is an integral part of the local culture. Bo Eide and his team are fighting relentlessly against this harmful invasive species.

Persian hogweed (Heracleum persicum) is a common sight in Tromsø. You can find it growing in gardens, yards, along roadsides and beaches as well as in wastelands. Planted in the region’s gardens as early as the 19th century, Persian hogweed is now so integral to Tromsø’s landscape and culture that it has been nicknamed the Tromsø palm. The impressive plant is depicted in ornaments and artworks, one of the municipality’s care home is named after it and so is an award at the annual Tromsø International Film Festival.

In early June, the Tromsø palm or Persian hogweed (H. persicum) was already in full swing, although the plants were still fairly small. At its best, or worst, the plant can grow up to three or even five metres long.

In Tromsø, there is a man whose life is inextricably linked to the fight against Persian hogweed. When Bo Eide walks the streets shovel in hand, the Tromsø palm is gone in an instant. The Tromsø municipality’s invasive species expert and his team have long been working to control hogweeds and other harmful invasive species in the area.

The vigorous Persian hogweed can grow out of a crack in the asphalt. Bo Eide in action.

Getting rid of Persian hogweed is demanding due to Tromsø’s vast size, its many small islands, the abundance of vegetation and, in part, the attitudes of the residents. Some love and defend the plant, others hate it, and others have an indifferent attitude towards it.

We toured the main island of Tromsø and other smaller islands with Bo Eide when we visited Tromsø in June 2024 as part of the Barents IAS project. In addition to the Tromsø palm abundant everywhere, we also got to see the Nootka lupin (Lupinus nootkatensis).

Susanna Winqvist (left) and Christell Åström marvel at the tremendously tall flower head of last year’s Persian hogweed.
The Nootka lupin (L. nootkatensis) colours the landscape in places as intensively as the garden lupin (Lupinus polyphyllus) in southern Finland.

Light at the end of the tunnel

Although the situation in Tromsø may look hopeless on the outside, there is still light at the end of the tunnel when it comes to eradicating the species. Bo explains that control efforts have been concentrated on areas of particular natural and recreational value, and on islands with smaller hogweed populations that can be completely eradicated. We visited a popular park, for example,  where hogweeds have been weeded out.

At the southern tip of the main island of Tromsø is a popular ‘folk park’ where Persian hogweed has been successfully eradicated through persistent control work.

Another destination where successful control work has taken place is the island of Sommarøy, loved by tourists.

Bo Eide photographing the only Persian hogweed found on the edge of a cemetery on Sommarøy. He is pleased with the results of the control work.

During our visit, we also had the pleasure to meet Cathrine Amundsen, who is the senior environmental expert for Tromsø and Finnmark County. She introduced us to the county’s work against invasive alien species and we had a fruitful discussion about the challenges both our countries face and possible opportunities for cooperation.

After a very interesting and educational visit, we wish Bo, Cathrine and all the other IAS heroes good luck in their fight against the Tromsø palm!

Check out Bo Eide’s presentation: Winning battles but not the war against “Tromsø palm” (Persian Hogweed, Heracleum persicum)

Follow us as we release information about the project. Later this Autumn, we’ll publish a short video filmed during our trip where Bo Eide talks more about the topic.

Shooting a short video on IAS work in a stunning traditional landscape. Martina Motzbäuchel (left) filming and Ella Ahti interviewing Bo Eide.

With us on the study/networking visit to Tromsø were Ella Ahti, Project Coordinator of Barents IAS from the Natural Resources Institute Finland (Luke), Christell Åström, Executive Director of Rural Women’s Advisory Organization, Susanna Winqvist, Communications Manager of Rural Women’s Advisory Organization and photographer Martina Motzbäuchel (Valokuvaus Lichtwerk).

Text and photos: Susanna Winqvist (Rural Women’s Advisory Organization)

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