The Barberry Connection: How One Shrub Turned Your Yard Into a Tick Factory

The Hidden Threat in Your Landscaping

Japanese Barberry (Berberis thunbergii) was introduced to the United States in 1875 as an ornamental shrub. By the early 2000s, researchers at the Connecticut Agricultural Experiment Station made a startling discovery: properties with dense barberry had up to 120 times more blacklegged ticks than comparable properties without it.

The mechanism is straightforward but devastating. Barberry creates a humid, protected microclimate at ground level. White-footed mice, the primary reservoir for the Lyme disease bacterium Borrelia burgdorferi, thrive in this environment. More mice means more ticks feeding on infected hosts, which means more infected ticks waiting for their next meal: you, your children, or your pets.

Why Capital Region NY Is Ground Zero

The Capital Region sits in the epicenter of both the barberry invasion and the Lyme disease epidemic. Albany, Saratoga, and Rensselaer counties consistently rank among the highest in New York State for Lyme disease cases. The region's mix of suburban development, woodland edges, and decades of barberry planting has created perfect conditions for tick population explosions.

Properties in Clifton Park, Saratoga Springs, Niskayuna, and throughout the Capital Region often have barberry plantings from the 1980s and 1990s that have since escaped into adjacent woodlands. What started as a few ornamental shrubs can colonize entire forest understories within a decade.

The Solution: Professional Forestry Mulching

Hand-pulling barberry is ineffective for established colonies. The root system is extensive and any fragment left behind will resprout. Chemical treatment with glyphosate works but raises environmental concerns, especially near water features and in areas used by children and pets.

Forestry mulching is the gold standard for barberry removal. Empire Land Clearing uses a Kubota SVL75-2 with a high-flow forestry mulching head that grinds barberry down to ground level and into the root zone. The mulched material is left in place as a natural ground cover, suppressing regrowth while the tick habitat is simultaneously destroyed.