I have a trumpet vine. I needed to move it, and during the relocating, I also cut its woody upright trunk about 3 feet up, and it was about 6 feet — the woody part. It had a lot of leaves, or branching growth. I wonder what would I have to do to start a new plant from this part I’ve cut off?
The best way to propagate the top part of your vine Campsis radicans) is with semi-ripe or hardwood cuttings.
North Carolina State University Extension has good general information on propagation. The Royal Horticultural Society’s page about Campsis includes information on various propagation methods.