I believe there is a branch of the CA Rare Fruit Growers in Phoenix, at least there used to be. Apples don't come true from seed. It is pot luck. You might get a good one, or you might not. Also remember a lot of our fruit trees are grafted onto root stock that helps the tree, usually with disease. Like stone fruit on nematode-resistant root stock. Fuji apples require more chill hours than what you get in Mesa. Chill hours are the number of hours below 45 degrees but above 32 degrees. For Tucson, 100-200 chill hours works well. Anything over that and it is hit or miss. Not sure what your chill hour requirements are for Phoenix area, but would be at least as low as Tucson. Chill hours are important for all stone fruits, pears, cherries. Citrus doesn't matter. I've given up trying to grow apples, they just don't do well for me and the fruit is substandard. Better quality from Willcox
and we just limit ourselves to apples for a short season in the fall for however long we can store them.