Since ancient times, explorers have brought back seeds and seedlings from exotic lands. Some, like the apple, have been a boon to the citizens of their adoptive home. Others, like the notorious kudzu vine that has taken over parts of the south, have been more headache than boon. New England, with its cold climate, is blessed with a natural defense against kudzu and some other invasives: our winters. Unfortunately, there are plenty of invasives that like it here.