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If you see green, it might be buckthorn. Fall and winter are a great time for buckthorn treatment.

Late fall is a great time to assess your property for woody invasive species. The three most common woody invasive species that are found in Anoka County are Common Buckthorn, Glossy Buckthorn, and non-native Bush Honeysuckle. These three species tend to hold on to their leaves long after our native trees and shrubs. Since the leaves on these invasive species also tend to stay green instead of change color like our native species, they stick out like a sore thumb this time of year. These species can easily out compete native woodland species, deteriorating our woodlands and wetlands.

Common Buckthorn:

Common Buckthorn tend to look like a large shrub or small tree, reaching approximately 20 feet when fully grown. The most distinct characteristic of Common Buckthorn is the twig endings often contain small, sharp, stout thorns. When Common buckthorn is cut down the heartwood also have a distinctive orange color. This tree can be easily confused with our native plums and cherries.

Glossy Buckthorn:

Glossy Buckthorn has a similar structure as Common, they tend to grow like a large shrub or small tree, reaching approximately 20 feet. Glossy Buckthorn can be found in forests, but tend to favor wetlands and wetland edges. Glossy Buckthorn does not contain any thorns but also has a yellowish orange heartwood when cut. The look-alikes for Glossy Buckthorn include some native dogwoods and alder.

Non-native Bush Honeysuckle:

Non-native Bush Honeysuckle is a shrub that typically grows 8 to 12 feet high. The older Honeysuckle often have a shaggy tan bark and stems that are often hollow. The leaves on the Honeysuckle are opposite, simple, oval, and untoothed. The shrub produces pink and white flowers in the spring.

Find more information on common and glossy buckthorn ID and treatment methods on the Anoka CWMA website.

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