This is the famous real Cork Oak which produces soft bark that is known to be used widely as vine bottle plugs, picture frames, etc. since ancient times. Quercus suber is a lower grower and less cold tolerant so it is best to overwinter frost free. It makes an excellent bonsai though and looks exotic enough on a sunny patio in the Summer. If you want to harvest a layer of bark you will have to wait 10-12 years.