The Mediterranean Palm Tree can survive in temperatures in the 5-15 degree range. Palms like this can be winterized by adding dirt and mulch around the base in the winter to keep the ground around the base from freezing. Here is a description of this palm:
Mediterranean Fan palm trees' leaves are arranged in a symmetrical crown that can reach 8 to 10 feet wide. Mediterranean Fan palm trees have:
Triangular, fan shaped leaves
Leaves ranging in color from blue-green to gray-green to grey-yellow.
Multiple trunks surrounding the main trunk in more mature plants
Leaves that are arranged into symmetrical crown that is about 8 to feet wide.
Trunks that are usually covered with a loose mat of coarse gray or brown fiber and can grow to heights of 20 to 40 feet.