Better to be prepared than to lose the living plant. A timely cover of straw, laid loosely on top of the crowns of Hedychium spicatum and Brugmansia aurea will keep the cold and damp from destroying the growing parts of these semi tender plants. The air trapped within the dry straw acts as an insulating layer. This gives the root zone protection from penetrating frost and lingering damp. The plants being native respectively to the Chinese Himalayas bordering Burma and the Ecuadorian Andes. In the wild they will not experience the lingering damp cold that our climate is renowned for.