Larry, they were all three bred in Florida, perhaps not the best plants for zero and sub-zero temps. Where I live we have had unusually cold, wet winters with very little snow cover for two years. Gilded by Grace was not mulched the winter it had the major setback. God Save the Queen was in a pot that repeatedly got too wet. I've seen those two grown in the north and flourishing. I think I just need to better protect them during future winters by heavily mulching.
