19/10/2012 at 07:41
Are your cordylines very exposed? Ours have always survived quite happily outside without any protection (north-east aspect but some frost protection from trees). It's a tricky judgment to make as with or without can be risky just in different ways.
Agree that if you do want to protect that you use breathable fleece which will hopefully allow some air to circulate and don't wrap it too tightly.