Nandina is a really tough
plant, don't worry too much, you'd have a hard time killing it if you tried! Keep it well watered the first season it is in the ground to help it get established. Domestica does tend to spread, so be sure to
plant it in an area will the running shoots will not be a problem. Since Arizona summers are so scorchingly hot, you might consider planting it in a location with a little shelter from the sun, but not in too much shade or it won't produce as much color on the leaves, which is one of the things that make the
plant so attractive.