I planted my two Trumpet vines by my dogs chain link fencing. It takes anywhere from 5 to 7 years for them to flower, but when they do you get ,more and more trumpets every year, and if you plant them , the Hummingbirds will be everywhere, they love them.
Michele >^,,^

Just a warning for those new to the trumpet vine. I purchased a new house last summer where the previous owners had planted a trumpet vine that was never pruned. It bloomed beautifully, but was very invasive. It was creeping through the privacy fence on my deck, through the boards actually pulling the decking away from the house, and trying to attach itself to the stucco on the house. We did have to cut it down because it was leaving stains and marring up too many things. I wish it could have been saved and replanted somewhere else, but that's life.