What rose is it? I had a Great Western that used to do that on occasion but not to that extent, usually just another bud in the centre of the bloom.

"Spray Cecile Brunner"

My Spray CB proliferates sometimes as well, often weather related, but it is usually only a large green eye, nowhere near as bad as GW, which I removed because I thought it might be virused, it happened so often. I think it is a form of Phyllody, but I'm not sure. That is usually when petals become leaves. It appeared on one of my perennial wallflowers in spring last year, so I cut off the affected flower heads and it has been OK ever since. I thought that might have been mite damage.

I've had that happen. I think it can be weather related or the result of too much fertilizer.

I seem to recall reading that 'Spray Cecile B' is prone to proliferating. My youngster is not old enough for that, but is growing very quickly, so perhaps it will bloom and/or proliferate next year.

I do recall bluegirl mentioning that her 'Spray Cecile B' often had fused leaves or bracts, so that might be something else to look forward to...

Virginia