Question: are rhododendrons toxic to bees?
Answer: Rhododendron from the heath family (Ericaceae) is poisonous to bees and humans. It contains an andromedotoxin. Mountain Laurel (Kalmia latifolia) also contains an andromedotoxin which can poison humans. California buckeye (Aesculus californica) – has caused losses of honey bee colonies throughout its range.