Answer: The summer heat coupled with the winter cold makes it difficult to find a suitable vine for your trellis. Here are a few suggestions:
Lavender Orchid Vine (Mascagnia lilacina) is an evergreen vine native to (Coahuila) Mexico. It has twining stems bearing dark green, small oval leaves that are covered in fine hairs. The fine hairs that can cause skin irritation for some people.
Beginning in about May, Lavender Orchid Vine produces clusters of showy purple, orchid-like flowers, about 1 inch wide, the orchid shaped flowers are followed by papery, winged, chartreuse seed pods, that turn tan. A second flowering will sometimes occur in the fall. Lavender Orchid Vine will climb 15 to 20 feet up a trellis or fence, it will also twine upon itself, growing in a mound which can be a shrub or a groundcover. It is cold hardy to the mid-20's F.
Bower Vine (Pandorea jasminoides) is an evergreen that grows to about 20 feet in part shade (shelter from hot afternoon sunshine). Even if it is killed down to the ground by winter weather it resprouts in the spring.
But my first choice would be Rosa banksiae, the Lady Banks' Rose. This plant takes the summer heat and the winter cold (hardy to about 10F degrees). It grows about 20' high and comes in either white or yellow flowers. It is evergreen, has very few pest problems and is reasonably drought tolerant once established.
Hope one of these suggestions is just right for your landscape.
Q&A Library Searching Tips