To remove the leaves is what allows the roots to grow where the leaf nodes were. Not every rooting system works all the time. In my garden they grow in a controlled manner as long as they are clipped regularly. They have covered a 15'x40' arbor in less than three years with three separate plants planted in equal spacing in the soil. Some winters can be extremely harsh as some very hot extreme summers have been lately. Try growing roots on trumpet vine again in the late fall best time to grow roots from the vine from semi wood growth from the current years growth. REMEMBER to always Remove all the leaves from the vine planted under the soil and plant only a inch or two deep… and hold down vine planted with rocks. Fall and winter is when roots grow strong for spring growth. Good Luck.
