Bought two Passionflowers. Placed in large pots next to each other. One is climbing like a monkey, beautifully green positively thriving, the other smaller was a bit scraggy when bought but no leaf problems. sighted correctly, watered and fed correctly but the smaller ones leaves drooped didn't change colour at all but today they all fell off. Is the plant dying. It is growing in exactly the same conditions as the thriving one. The only difference is that the struggling plan was quite small when bought. Can i save it.