Posted: 06/11/2013 at 15:53
Totally agree with the above. Those hardy ratings only look at minimum temperatures and as we have mild winters but very wet ones, hardy ratings are useless.
Our winters are wet, mild and long. American ones are shorter, colder and drier.
The trebrown map above puts me in 9a which is the same as California and Florida... alas our weather is not at all like that.