Hi Cariffas, and welcome to GOY. I think it depends on several factors - the temperatures, where you live, where your plant is positioned, (is it sheltered?) etc.

It is only rated as 2 stars in the RHS book, so that means it can't take heavy frosts. I'd be inclined to fleece it. Good luck!

This plant is fairly hardy, but benefits from the shelter of a wall or fence behind it, and will certainly be safer with some fleece, or straw, or something to help protect it. Not sure where in the UK you live, but in milder areas, not sure protection is entirely necessary though.

I had the same one once from Cornwall, lovely plant. could you not pot it and bring it in when frosty? I do think that global warming is real but we could still have proper frosts yet. By the way the reason I don't stil have it is that I planted it outside when it got too big.

I can't help with your question, but welcome to GoY. ;-)