I agree with Lynn that Bronco is a toughie.
I am in zone 9b which doesn't seem to indicate extreme temps but I have lost semps for one reason or another despite the "mildness" of this zone. The ones that have survived for 3 years with no problems are:
Pacific Green Rose
Kramer's Spinard
More Honey
Brownii
Green Wheel
Please note that these have been survivors but not necessarily producers of many offsets.
