Q.What Can I Expect For Growth On A New RED YUCCA In Southern Arizona?
For a new (just purchased) Red Yucca Plant in a large container with a mix of gereral purcase soil and sand.

Certified GKH Gardening Expert
Irrigate it regularly for the first year, taking care not to overwater. Thereafter, native rainfall should be sufficient. It is a slow grower, eventually reaching 2 to 4 feet tall.
https://www.gardeningknowhow.com/ornamental/foliage/yucca/red-yucca.htm
https://cals.arizona.edu/yavapai/anr/hort/byg/archive/redyucca2021.html
https://www.public.asu.edu/~camartin/plants/Plant%20html%20files/hesperaloeparviflora.html