9cm pot. Araliaceae, the ivy family and home of many rewarding and fascinating plants. Tetrapanax is a king of hardy exotic small trees in the UK and essential for a "jungly" garden. I've had this grow back from the roots even after being hammered by a low of -17c back in 2010. In usual winters it loses its leaves but keeps all other above ground growth, flushing out with massive leaves each spring.