kate007,
to All Things Plants! That's a beautiful fern in your photo ... I found it in our database, the botanical name is Balantium antarcticum with Dicksonia antarctica being a synonym:
Soft Tree Fern (Dicksonia antarctica) but it's only showing zone 9 ... wonder if that's a mistake?
This site shows winter hardiness of 20º to 25º:
http://www.smgrowers.com/produ...
and MOBOT shows it zone 9 & 10:
http://www.missouribotanicalga...
I've always thought it was a fern for temperate zones and I'm thinking it might take some cold but consistent freezes would probably kill it.