I am sorry for this delayed reply to your gardening question. We are transitioning to a new Q&A system and your question was unfortunately lost in the transition. I have discovered it now and hope this reply is not too late to be of help.
If you mean that the plant does not set fruit, this is normal with many types of passion vine. If the bloom buds are dropping before they open then this is not normal. The only cause of bloom drop prior to opening is some insect damage while still in the bud. Thrips may be a cause. Products containing Spinosad are a natural, effective option for controlling thrips.
I suggest you also contact your local Extension Office to see if they have any additional suggestions or can look at a photo or a plant sample to help with the diagnosis.
Thanks for the question. Please stop in again soon!
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