The Queen Palm is a fast growing upright palm tree. It is a very popular palm in Arizona. As it matures it does not like to be over watered. The Queen Palm has an average height in Arizona of 25 to 35 feet. Its leaves grow up to 15 feet long and it is hardy to 25 degrees F. This description is based on our observations and research of this plant growing in our hot Arizona climate. We would love hearing from anyone who has any additional experience with this plant in Arizona.