I have a R. floccigerum that looses about 75% or more of it's leaves every year. I have had it for atleast 10 years. The leaves are not being eaten by insect or animal, they fall off at the end of the season. New leaves are produced every year and they look healthy and remain on the plant throughout the summer and start shedding off. I have moved the rhodo, to see if a new location, with different light and watering would make any difference. It has never flowered, which does not concern me, just wondering if anyone has more information on this species of rhodo and might be able to let me know whether this is typical for this rhodo or should I try and site it in a different location? Any information would be very much appreciated.