I had a tulip magnolia when I lived in Austin but 'only' have a grandiflora magnolia here in Dallas. In the approx 10 yrs in Austin my tulip tree never bloomed in summer. These trees are very popular in Dallas. I saw many blooming in spring per usual. Don't see any blooming now and that's one thing that I would definitely notice. So I can't explain it but would advise you to do what you can to make sure it stays healthy. And remember that stranger things have happened. I think.
