I didn't really overwinter my sungold, but I did cut it all the way down almost to the ground late last summer just because it was too out of control. It grew back as big as ever within about a month. It lasted all the way until late january when we had a 20 degree night that finally finished it off.

Hey ggdervishian; I don't grow hybrids, however my experience with heirloom tomato plants (Indeterminate only) don't produce well the second year. Some Pepper plants do ok but not as well as starting from seed. I understand why you would want to do this. But don't take my word on it. Grow it out, but also buy more Sungold and start from seed too.