Problem Plant: Japanese Barberry

Japanese Barberry (Berberis thunbergii)

This native of Japan was introduced to the U. S. in 1875 when it was promoted for
use in hedgerows. It is still widely used for that purpose due to its resistance to deer
browsing. As early as 1910, it was observed to be escaping from cultivation, and it
now poses a threat to forests and parkland from New England to North Carolina.

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Tags: Invasive spread by berries and creeping roots, Forms dense thickets in forests and fields, Raises soil pH and reduces litter layer in forests, Has competitive edge over native plants as deer do not eat it, Nursery for deer ticks which spread Lyme disease, Mid-size shrub with arching branches and fruit, American Beautyberry (Callicarpa americana), Arrowwood (Viburnum dentatum), Highbush Blueberry (Vaccinium corymbosum), Maple-Leaf Viburnum (Viburnum acerfolium), Ninebark (Physocarpus opulifolius), Pasture Rose (Rosa carolina), Swamp Rose (Rosa palustris), Virginia, Sweetspire (Itea virginica), Winterberry Holly (Ilex verticillata)