Mine haven't even lost all the old leaves and they are merrily sprouting, but I don't normally prune them hard until well into April at the earliest. I might tidy up some of the old long sprawling branches before then, if they're in the way of something else.
One exception is that I have just this week chopped down a S. Nachtvlinder to almost ground level, and hoiked out some of it, where it was spreading a bit too enthusiastically. That variety is a bit different to most in that it spreads underground like a running perennial. I have other plants of it and I won't be upset if that one dies, but I bet it won't.
If you want more of yours @sonia.tadaa23317 , you could take some cuttings from the new shoots. They root very easily.
I've had some hot lips for about ten years. Every year they grow to about 3-4 foot across and a similar height. I cut them right back to 12 inches in mid April. They look awful at first, literally just a few thick stems with no leaves, and every year I think I've gone too hard. Fast forward six weeks and they look great again.
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Thank you, very helpful JennyJ!