Rhododendron griffithianum RH griffithianum is a species of almost pure white blooms, and there are several specimen plants (both young and mature) found in various locations around Achamore Gardens. The key qualities of this lovely essence are serenity, peace and tranquility, which comes to one immediately upon taking a few drops. This essence was added to the LTOE combination Gentle Geisha in order to produce the essence Gentle Sleep. Use Rhododendron griffithianum when you are stressed and tired and in need of relaxing, such as at the end of a hard day's work.