I live in north western part of West Virginia. I had never heard of this plant until i moved here,
my mother in law has them growing in her front yard which receives full sunlight for most of the day. they are very pretty plants by the way.
Moon trumpets, also called "moonflower," are hardy to USDA zone 8. In general, zone 8 includes the coastal half of the states along the bottom and left of the United States. It can grow in colder areas during the summer, but it will die out over winter.