Hi, they range from frost hardy, which means hardy to about 25 f or minus 5 c, to frost tender, which means your minimum temp needs to be 41f or 5c, but as you have it in a pot, which makes it more susceptible to cold, I would put it somewhere frost free for the winter, preferably a greenhouse, Derek.

And I'll add, yes, it is too late to feed.

ThanksBamboo, forgot that bit :-), Derek.