I would keep the tree inside through this winter if you have a spot with good light levels for it. Then plant it out in May next year when the worst of the frost has past . Make sure that you don't water it too heavily. They prefer to be on the dry side and will use a lot less water when they are in lower light levels i.e. indoors. We still have 3 litre trees for sale on the website and the trees should be widley available to pre-purchase in Garden Centres next year. These trees will not be available to collect in Garden Centres until the end of May 2007 though.