My mandavilla is full sun, watered daily, and presently is hanging from a pergala and was growing vigorously. In fact, I have two and the one in question was the prettiest. It is now losing blooms, leaves are shrinking, and in general looking very sickly. It's campanion is still doing nicely. What is going on? I have never had this to happen. Both had reached the top of the structure and were growing so well.....thank you for your advice...before it's too late!