Answer: There may be a combination of reasons your new vines are not growing as quickly as you expect. It does take time for the roots to become established. While the plants are concentrating on getting the roots established, they will fail to put out new top growth. Hot weather can also stress plants. In fact, most plants stop growing when temperatures reach 90F or higher. When the weather cools down, they will make up for lost time. Bougainvilleas and roses don't seem to mind hot temperatures. In fact both of these plants thrive in the summertime heat of the desert! So, I'd just recommend you be a little more patient with your new vines. As soon as the growing conditions meet with their approval, they'll begin sending out new shoots and flowers.
Best wishes with your garden!
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