vegas is obviously not paradise when it comes to gardening. Too hot, too dry, and also too cold(during winter) for many perennial fruit/ornamental species. And it does not help reading the care tip tags attached to the plants’ pots when you take them home from home depot, because most will advise to grow in ‘full sun’.
when they say full sun, they are talking about the sun over at mild regions of california. Full sun in vegas during summer often equates to death. If you don’t see many bird of paradise and cannas here in vegas, it is because everyone seemed to have planted them under full sun. Growing them at the north side of your house and close to your house is only way of assuring their perennial existence. Quite certain would be the same results for folks who want to grow them in phx and similar areas.