Rhododendrons, how necessary is it to cut off all old blooms ?

How will it affect the rhododendron bush if I don't cut off all the old blooms, will it bloom less next season ?Rhododendrons, how necessary is it to cut off all old blooms ?
not necessary at all. no it will not bloom any less next year leave it alone they take of them self, if u don't touch it it will bloom even more next year,Rhododendrons, how necessary is it to cut off all old blooms ?
Buds for next year, form on new growth, so no, you don't have to take the old blooms off, but I do if they start looking tacky. But mine is now about 8 ft tall and 5 ft. wide, so is impossible to get them all.
it's not necessary, but sometimes its nice to do a little trimming to make it look neat and tidy. it depends what look you're going for.
It makes the plant look ugly if you don't clip them off.