I took a lot of cuttings of Stevia last year and gave most of them away. I like giving away cuttings, not only to give other people plants but in the hope that if anything ever happens to mine, some of my friends would be able to give me back cuttings from their plants.
According to everything I've read whilst trying to find out how to save my Stevia over winter, Stevia is extremely difficult to overwinter but I decided to try with five well rooted cuttings. I put them in the little space where I do my knitting next to some French windows to give them enough light and watered them rarely and checked up on them almost daily. I moved the first one to look as though it was struggling into a warmer area but it never recovered. The next one I moved outside as the weather wasn't too cold and it looks as though it's died too. The three remaining plants are still next to the window and I'm hoping that the healthy one will live long enough to be the mother plant for more cuttings for this year.
I haven't thrown the others out because Stevia often regenerates. I had a plant that looked dead last summer but regrew from the base and continued to flourish once it was watered regularly. Perhaps there's a chance that the "dead" plants will regrow once the heat comes back into the air and the days get longer. For the time being I'm keeping my fingers crossed that nothing happens to it until I can take a few cuttings and put it outside to grow on in a bigger pot.