(Trachycarpus fortunei) Plant this hardy palm near your Hardy Banana and invite the neighbors over for a luau. This tough fan palm is hardy to about 10 degrees and thrives in the Pacific NW. It likes full sun and a well drained soil. It can grow up to 30' high and 10' wide under ideal conditions, but is usually much smaller. It also grows well indoors in a pot. One gallon size.