Hello, I planted a trumpet vine last summer along side my fence , I planted it in front of a fence post so I can I can tie the trumpet vine to the fence post It is still a very young plant,I would like to train the trumpet vine to form a tree ,I would like to know how to train it to look like a tree? This week I planted a climbing rose fine about three feet from the trumpet vine ,Will the trumpet vine damage my climbing rose vine?
Trumpet vines can spread and take over large areas. Eventually, it likely will overwhelm the climbing rose planted within 3 feet of it. It won't harm the plant other than creating shade for it and competing for nutrients and moisture.
To train the trumpet vine into a tree form, tie it to the post, as you suggest. Select one shoot to be the main trunk, and remove any side shoots as they develop. Over a period of a year or two, the main shoot will become woody and more trunklike.