Re: Wrapping up for winter...
I've still got bubble wrap over my Camellias because we're still getting night frosts.
It's so annoying because some are in full bloom and I can't see the lovely flowers, but the frost will take the buds if I don't.
The Rhodedendrons are more hardy though, I've got the pot wrapped and put thick bark chips over the surface compost, but the plant itself is uncovered.
This should be of help, Carol:
https://www.rhs.org.uk/advice
Dammit. I can't get the link right. The above one is the RHS, but it should have taken you to the Cordyline page.
If you just put Cordylines into their search box you should see the info on winter care, Carol.