I had them growing vigorously during the winter in our low desert home. There they bloomed near dusk, stayed open until the following noon, filled the little area with the faintest of Moonflower scent. A year ago now, I moved our little garden and am waiting for new plants to grow in. Mine don't get enough good sun either but I'm now starting to see new growth. My goal is Moonflowers & Morning Glories happy together, no overpowering or invading!
Good luck!