I have two Cordyline Indivisa Dracena Palm trees in my front garden.  I live in northwestern England in Lytham St Anees, near the Irish Sea coastline.  They were both planted in April 2008 and are doing well after six months.  Is there any special care I should give them during the winter months for protection (ie, wrap them) ?  Thank you, in advance, for any suggestions you might have,

Wayne