By Scout Nelson
Minnesota has started a three-year phaseout of rowan mountain ash to protect forests and natural plant communities. Beginning January 1, 2026, this tree is now specially regulated under the Minnesota Noxious Weed List. Nurseries have until January 1, 2029, to stop selling the tree across the state.
Rowan mountain ash is known for its white flowers, rounded canopy, and bright orange to red fruit. While it is attractive and popular in landscaping, the tree has become a growing concern for forest health. It spreads easily because birds and wildlife eat fruit and carry the seeds to new areas. Once established, the tree can dominate forest areas and limit the growth of native plants.
This tree was brought to North America from Europe and Asia in the 1700s and became popular in gardens. Over time, it escaped cultivation and spread into woodlands. Mature trees can form a dense canopy, while young seedlings cover the forest floor. This combination makes it difficult for native trees and plants to grow naturally.
Although there is no requirement to remove existing trees, Minnesota encourages responsible management to limit further spread. Small seedlings can be hand pulled in early stages. For larger populations, mature fruiting trees should be identified and managed first to reduce seed production.
Cutting and treating stumps and leaves with approved herbicides may help reduce growth. Local extension offices can provide guidance on safe and effective control methods.
Minnesota also recommends planting native alternatives such as showy mountain ash and American mountain ash. These native species grow well in northern Minnesota and offer similar beauty without harming forest ecosystems. Educational resources are available to help residents identify native mountain ash species and make informed planting decisions.
This phaseout supports long term forest health, protects biodiversity, and helps prevent invasive species from spreading further into Minnesota landscapes.
Photo Credit: gettyimages-paul-hartley
Categories: Minnesota, General, Rural Lifestyle