Do I need to do anything to my Salvia
I planted a Salvia last year (purple - think is was sylvestris), it did v well. Nothing had been done to the garden for years so I was v pleased. It flowered well into October or maybe even November, we enjoyed it for a long time. I don't know whether I need do anything now, the left over long stalks (from the flowers) seem dead, do I need to cut these off? Or do I leave the plant as is?