I had a trumpet vine that was twelve years old. This spring it bloomed again like it has for the last 8 or 9 years. Beautiful. Then about three weeks ago, 1st of September, the leaves started turning yellow. I fertilized. Got worse. Suddenly all the leaves fell off and the trunks which were 1 to 1 1/2” in diameter were also DEAD. We all know how trumpet vines can be invasive, well, there are several little vines popping up in the area of the dead vine. Can anyone shed any light on this mysterious death. What did I do or didn’t do. This vine was affording me a lot of shade on my southwest facing back porch and now it is gone. Thanks.