Short answer, plant's probably not going to live long. Witch Hazel (which includes winter hazel) is generally considered hardy to Zone 5-8. One variety is more heat tolerant to Zone 9. Zone 10 is going to be challenging. Look for the plant to live for a few years, gradually weakening and then dying. Your mileage may vary but Zone 10 is almost tropical. The plant has "winter" in its name for a reason...