What should I do with my Salvia farnacea in winter?

It's my first Salvia farinacea, and I'm very happy with it. It's been flowering in spring, summer, and autumn. Now that winter is coming, I'm wondering what to do with it... I need your help... Should I prune it? How much? Should I leave it as is and prune it in February/March? Small shoots are appearing at the base, as you can see in the photo. The plant is in a pot. I'm in Spain, on the Mediterranean coast, where we don't get any frost. Thank you so much for your help!

 

Ola @PzaMayor3

I pruned mine a couple of times a year to keep it tidy because I found it ungainly. After five years we got rid of it and bought a new one. It grew very fast here. I would cut yours back by at least one third, maybe half.

 

Cant help because I've only ever grown it as a half hardy annual.
But cutting back fairly hard does sound like a good idea.

 

Lucky you, no frosts. In England we throw them on the compost every year and buy or sow new ones in spring. In fact, I thought it was an annual!