The Rhododendron is over 2000 years old. It is known that Chinese in the beginning of our era cultivated these plants and kept them in pots. Much later, at the end of the 17th century, the Rhododendron came to Europe with the Dutch merchants. The Rhododendron occurs is a large spread area. It reaches from the Himalayas in China to Japan and Korea and Indochina. Furthermore there are even species in Northern America.