citrus in AZ is usually grafted onto sour root stock... let us know if you have luck getting the seeds to grow into producing trees.,,, But I've been able to get lemon, key lime, and orange seeds to grow, and I've got a couple elderberry seeds that have sprouted and I really hope they make it. I had a peach tree sprout from a pit a few years ago, but we had to leave town and nobody would take of it for me and it died. :-(