Zone is important but so is the microclimate and compass direction. If you are at altitude you might experience some more severe weather than lower areas. And if your sunlight is on the north side, it’s negligable. South would be best, west, reasonable. Can you bring the pots indoors, say a dark basement, and give them some moisture through the deepest part of winter? So it’s not an easy answer. But these are perennials so they have promise.
Zone is important but so is the microclimate and compass direction. If you are at altitude you might experience some more severe weather than lower areas. And if your sunlight is on the north side, it’s negligable. South would be best, west, reasonable. Can you bring the pots indoors, say a dark basement, and give them some moisture through the deepest part of winter? So it’s not an easy answer. But these are perennials so they have promise.