Posted: 19/10/2012 at 14:38
I have quite a few of these in my garden, Salvias being one of my favourite plants, and they're very hard to kill. In the wild they're mountain plants so our winters generally won't harm them (hardy to about -17C from memory) but they're not so keen on the wet weather so have them in a sheltered patch.
In late spring they will look way past their best, full of twiggy parts and not very pretty. Cut them right back to the base, where you'll probably see signs of new shoots coming through anyway, and they'll grow away like new. Don't be too precious about cutting it right to the base as I've never lost a single one, even though they do look past it.