Looks like Zone 9 (coastal) or 8 (Interior) Try this link:
http://www.uk.gardenweb.com/forums/l...146163246.html

"Kae Verens" wrote in message
...
I keep seeing references to zones.

What are they?

I'm in Ireland, for example, what zone would that correspond to? I never
see any mention of this in any books I've bought.

Kae