Hi, Marie,
It depends on how cold your winter was and if the ground froze. If it didn't sustain prolonged frost/freezing, it is possible that the foliage was killed and it could regenerate from the roots, but I think you'll just have to wait and see. Was if mulched over the winter? If it has survived, perhaps give it a thick dry mulch next autumn before the cold sets in.
Kathy C
Replied: Monday 20th of February 2012 10:25 PM