Rhododendrons are poisonous. The flowers and nectar contain grayanotoxin and the mad honey made from the flowers was one of the earliest forms of chemical warfare. Ancient armies would trick an opposing Ist das Mehltau an meiner Rhododendron? : r gardening Lebensbaum 'Martin' Thuja plicata 'Martin' Baumschule NewGarden Rhododendron Grazeasy 'Dark Pink' Rhododendron ponticum Grazeasy 'Dark Pink' Baumschule Horstmann