Japanese barberry has become a mainstay of Pennsylvania landscaping because it is uninhibited by weather, poor soil or natural predators. But, for those same reasons, a panel of agriculture ...

For more than two decades, Pia Van de Venne of Murrysville has been working to rid the municipality’s parks of invasive plants including barberry, garlic mustard and Japanese stilt-grass.

December’s Weed of the Month is Japanese barberry (Berberis thunbergii). This species is a specially regulated plant on Minnesota’s Noxious Weed list. Japanese barberry is a 3-6 foot tall ...