Almost any "fast-growing" vine is classified as an invasive plant. Wisteria
? ooohh invasive. Morning glory
? Oh yes, def. invasive; climbs all over everything, sort of like kudzu, but with flowers.
Allow me to add to this invasive list: trumpet vine
. Native to the S.E. United States, there are some massive trumpet vines in Berkeley, California (although the biggest one I knew of has been cut back; it provided beautiful privacy and quiet to a school playground a block from our previous house, covering a chain link fence some 18 feet high and a block wide). The flowers range from yellow through orange to deep red, tinged with purple undertones. Hummingbirds love it, as do bees and...ants.
But ants can be dealt with.
The first year, trumpet vine seems to be a slow grower. That's because it's growing roots, getting ready to GO the second year.
If you go for trumpet vine (or any of these), I suggest 1) digging in metal flashing at the boundary of the planting area. Leave approx. 1/2 inch to 1 inch showing, so that you can see where the boundary is at all times. This will help contain the roots, at least on your side of the fence. In the fall, when the flowers begin to set seed pods, decide whether or not you want those seed pods to mature and fall to the ground, establishing new plants. If not, start snapping the pods off as soon as they begin to dry. I did this religiously to our morning glory in Berkeley--maybe too
religiously. One year shortly before we moved, absolutely no
morning glories came up.
I kid you not.
Some people are sensitive to trumpet vine sap, so if you can find a plant nearby and check it out for yourself, that might be a wise step before committing to this plant.
I absolutely love finding these plants as I drive around on my errands in the East Bay. They're just amazing.
Sunset Zone 17, USDA Zone 9