Might I suggest changing that pot to a net basket or square plastic or wooden basket no more than 4 inches. I'm afraid that pot may lead to root rot given your temperature zone. Your roots will need to breathe more. Given your temperature changes with the seasons, you could still fill the basket with some coarse bark and perlite to retain some moisture as you may not have weather that permits everyday watering like the tropics.
Beautiful flower aside from all that!