if passion vine was overfertilized, should bone meal be added?

Question

passion vine not flowering after additional dose of Osmocote.

Answer 1

No, adding more fertilizer on top of too much fertilizer will end the plant. As of now, you will need to let those leech from the soil over time. Once the fertilizer returns to a less rich state, it will start to recover.

https://www.gardeningknowhow.com/ornamental/vines/passion-flower/passion-vine-fertilizer-tips-on-fertilizing-passion-flowers.htm

Just have patience until it recovers, and you will eventually be rewarded with a healthy plant.