Pinellia cordata is very hardy as long as it's kept dry during the winter. In the PacNW this means pot culture with overhead protection from the heavy winter rains. Cold it doesn't mind. However, if it goes bone dry in winter, it's very prone to rotting in the spring. Don't water at all until you see new growth, and then water cautiously until it's growing strongly. -- Rodger Whitlock Victoria, British Columbia, Canada Maritime Zone 8, a cool Mediterranean climate on beautiful Vancouver Island http://maps.google.ca/maps/…