I love planting these together with morning glory. I plant them both in large rectangular planters, and let them climb up two trellises that I have mounted to the brick facing of the house. They look so beautiful! I find that though they're not terribly xeric, they can take a lot of heat, and are prolific growers. Both moonflowers and morning glory are annuals in my part of the world (North Texas), but they often reseed themselves, and sprout back up in the spring. They actually reseed a little too well. I'm often pulling stray shoots out from parts of the garden where they're not meant to be! A little extra weeding is well worth having these beauties in your garden.