Can this grass stay out over winter?

I brought this in last year, but I'm wondering whether I needed to.

 

Looks very similar to one I have had for years - never found it needed any protection down here - just an annual "clean up".

 

Thanks @Philippa

 

That looks like Uncinia rubra, a sedge which is evergreen and hardy down to minus 5 C. If temperatures start to approach that level I’ll be moving mine into the garage @BB3.