I live in The Netherlands zone 8. I have this Salvia Wendy's Wish now for three years. Last year I planted it in the garden after taking some cuttings. We had a very mild winter but did loose the plant. The cuttings I took did very well and have these plants now in pots on the north east side of the house. The plants look lovely with about 5, 6 hours of sun. Taking cuttings of all Salvia's is very easy with always good results.
An other Salvia I love is Salvia indigo spires. I did put this plant with pot and all in the yard and this Salvia made it through our mild winter and looks great.