Winter hardy PSB

Is there a variety that has been bred for winter hardiness which will fare better in the harsh temperatures that we seem to get now?

According to ChatGPT: "Yes, there are several varieties of purple sprouting broccoli that are winter hardy and can withstand cold temperatures. Here are a few examples:

Rudolph - This variety of purple sprouting broccoli is known for its hardiness and can be harvested from late January to early April.

Red Spear - This is another winter-hardy variety that can tolerate cold temperatures and produces medium-sized purple spears.

Early Purple Sprouting - This variety is known for its early season production, typically from February to April, and can handle cold weather.

Claret - This variety produces deep purple spears and can withstand frost, making it a good choice for winter gardening.

Cardinal - This variety is known for its cold tolerance and is a popular choice for winter gardening in the UK.

It is important to note that while these varieties are winter-hardy, they still require adequate protection and care during cold spells to ensure their survival."

Unfortunately the variety I am growing is Claret and I think that it would disagree about withstanding frosts!

Sorry if it is bad info.

I just installed ChatGPT and have been feeding it questions as I think of them; saw your's, typed it in and that's what it threw out. Thought I'd share.

I am growing Broccoli Purple Sprouting Claret and it has not fared well over the winter. It may still produce but after every cold spell it looks dreadful. Is there a variety that has been bred for winter hardiness which will fare better in the harsh temperatures that we seem to get now? We have regularly had temps of -5C this winter and it got down to -12C. When I bought my Kale seeds some were advertised as winter hardy but I cant seem to find the same for PSB.

I grow early purple sprouting
 https://www.dtbrownseeds.co.uk/Vegetable-Seeds-1/Broccoli-Calabrese-Seed_2/Broccoli-Purple-Sprouting-Early-Seeds.html
It's as tough as old boots. It starts cropping about the end of Jan. Will be having some for dinner tonight! Not sure what temperature it got down to the last couple of nights but minus double figures was forecast. The soil is like iron & there's an inch of ice on the water trough. Very windy here too & there's salt in the wind. I planted a row of them last summer. No pampering at all, just stuck them in the ground & walked away!  A couple have died now but they are the ones that made flower spikes too early & we already had a crop from them before Christmas.

If you want something that crops a bit later (end of March & then through April) try Sutherland Kale. If you don't take too much to eat as leaves it makes lovely tasty spears & comes through any winter.
https://www.realseeds.co.uk/kale.html

(Edited to add links)

Another vote for early purple sprouting, although I find it crops a bit later than January here.
It is not an F1 variety so you can save seed.
I would be wary of a ChatGPT recommendation of what to grow. It will be basing its suggestions on the blurb from seed supplier websites that have been fed into it, not from anyone who has actually grown it.