MissyWeitzel does it rot for you? For me it just only made a single replacement tuber. And had a tendency to blow its center fast. It was a bummer, because it’s such a gorgeous bloom at its peak. I discontinued it because of those two qualities, but not because it didn’t keep.
The two I’ve had trouble with are
HH Snow Queen (8 - I can usually get one or two tubers through the winter)
HH Wicked Witch (7)
I’d give Ryecroft Balackberry a 6. It gave me a good scare about halfway through the winter, but about half of the tubers rallied. And most of the ones that didn’t were just blind.
My votes for 1 ratings:
20th Ave Softer Peach
SB’s Ora (bonus because they’re adorable little grapes!)