RM - not hardy as such, however it can be classed as a tender perennial. Mine usually survives most winters. It didn't 05/06 and the leaves have died back this winter however I shall wait until a bit later in the year before I decide if it has had it or not. Most things seem to have survived ok this winter. My bronze fennel is still putting out small fluffy fronds.

__________________
Bright Blessings
Earthbabe
If at first you don't succeed, open a bottle of wine.