I am in Zone 4 -- I moved my to morning sun till about 1:00pm and they do good with that. ALso I have lost quite a few but stick with those that are hardy up here...
Midnight Rose
Fire Chief
Lime Ricky
Southern Comfort
Caramel
Hercules
Pepermint Spice
there are others out there -- i need to go see what made it thru last winter again -- will add more to this list later.