Urban meadows may increase ticks and allergies in Lappeenranta

Wildflower meadows introduced to boost biodiversity in Lappeenranta are creating unintended problems, including a rise in ticks and allergy-inducing pollen, reports Yle.

Over 50 hectares of the city’s green spaces—more than one-sixth of its managed areas—are now maintained as meadows. While these areas support wildlife, they also provide ideal conditions for ticks, a growing concern in a region already known for high tick populations. Lappeenranta offers free tick vaccines to some residents due to the risk of tick-borne diseases.

“We’re aware of the downsides, like invasive species and ticks. In problem areas, we avoid meadows and maintain clear edges along paths,” said Sanni Simonen, the city’s production manager.

Research led by university lecturer Eva Kallio suggests meadows near forests attract more tick hosts than those in built-up areas. Dense, lush meadows are particularly favorable for ticks, while drier conditions are less hospitable.

Spanish slugs, an invasive species known to attack even bird nestlings, have also spread in the meadows. The city has increased pesticide use and monitoring to control their numbers.

Allergies are another major issue. Unlike regularly mown lawns, meadows release large amounts of pollen—especially from grasses—throughout the growing season, worsening symptoms for allergy sufferers. The city promotes meadows for their microbial exposure benefits, which may support immune health, but for those with allergies, this means persistent respiratory difficulties.

High meadow vegetation can also obstruct visibility at intersections and roundabouts, raising traffic safety concerns. While the city prioritizes maintaining clear sightlines, rapid summer growth can temporarily reduce visibility between mowing cycles.

Public opinion on the meadows’ appearance is divided. Flower-rich meadows receive positive feedback, but grass-dominated ones draw mixed reactions, particularly as their appearance deteriorates by autumn.