I have a very vigorous winter flowering clematis "jingle bells". It was planted 3 years ago and is now covering a third of my pergola. Last winter (and it seems a repeat of the same problem this winter), hundreds of flower buds developed but all dropped off before opening. I have looked closely at the stems and the point where the buds formed but cannot spot any problems. Any ideas please.
Clematis jingle bells
Flower bud lossJump to latest post
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