Buckthorn, specifically Common Buckthorn (Rhamnus cathartica) and Glossy Buckthorn (Frangula alnus), is one of Wisconsin’s most persistent invasive species. Originally introduced as a hedge plant, it has since spread aggressively, disrupting native ecosystems and threatening local biodiversity. Buckthorn is prolific, shading out native vegetation, altering soil chemistry, and creating dense thickets that hinder wildlife movement and habitat quality.
Buckthorn’s invasiveness stems from several characteristics that make it hard to control. For starters, it produces abundant berries that are easily spread by birds, leading to rapid colonization. The seeds can survive in the soil for up to five years, meaning that even if a mature plant is removed, new shoots may continue to emerge for years. Additionally, buckthorn is highly tolerant of shade, allowing it to spread widely, especially in forested or partially shaded areas. Its dense root system and canopy outcompete native plants for nutrients, water, and sunlight, quickly establishing a monoculture that dominates the landscape.
For effective control, cutting buckthorn and treating the stumps are essential. Here’s a practical approach to managing buckthorn on your property:
- Identify Buckthorn: Look for dark green, oval leaves that remain on the plant longer than those of native species, particularly in the fall.
- Cutting: The best time to cut buckthorn is in late fall, winter, or early spring. Use a handsaw or lopper to cut the plant as close to the ground as possible. Make sure to cut all stems, as even a small section can regrow vigorously.
- Stump Treatment: After cutting, treat the stump immediately to prevent regrowth. Apply an herbicide to the freshly cut stump within 30 minutes of cutting. Use a brush to apply it directly to the stump, minimizing risk to nearby native plants.
- Monitor and Maintain: Buckthorn seeds can stay viable in the soil for years, so monitor the area for regrowth and treat any new shoots. Annual inspections in spring and fall are ideal for catching any resprouting plants.
Replanting native species helps restore the area and prevent buckthorn from re-establishing. With consistent effort, you can protect Wisconsin’s landscapes from this invasive species, supporting a healthier, more biodiverse ecosystem.
Landmark Landscapes has extensive experience with cutting and treating Buckthorn. We have cleared hundreds of acres in an effort to protect our client’s property from this invasive threat. Contact us today to learn how we can assist you with clearing Buckthorn from your property.
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Landmark Landscapes of Sheboygan Falls, WI is a full-service landscape company. Based out of Sheboygan County, with a Green Lake, Wisconsin satellite office. We are centrally located and uniquely positioned to service the areas of Sheboygan, Elkhart Lake, Fond Du Lac County, Green Lake County, Ozaukee County, Manitowoc County, and Door County. We can manage your property with our Total Property Care system, and design and build projects large and small. Contact us today at 920-467-6442 to learn how we can care for you.
