I got to meet mostro by chance, when I spotted the tops of his mango trees when I was driving by his neighborhood. Always been told that I'm just wasting my money planting mango trees here in Jax. So when I saw the mango trees, I got really curious and went to ask about it. He's a very nice guy, allowed me to check out the trees and answered all my questions. His mango trees are beautiful and productive. I wish I had my phone when I was there to take a couple of pics to show here. I didn't know about this forum until after I met him. I ran into this discussion (and recognize the pics) doing research if there was other people in Jax that has mango trees and what soil is best for keeping mango trees in pots. I'll take pics next time I go talk to him to ask for his process on protecting the trees when it gets cold as I have 2 mango plants now. Mallika & Kesar :)

In California that would be a very healthy Manila Mango. IF purple it could be Valencia Pride. Two of the most common here. Where you are,anything that can take high humidity grows like a weed!

Cinnamon. They won't cross over it and they will actively avoid it. It won't kill them but it will create a barrier. I've sprinkled it in my cherry and mango tree when they were actually in it and they fell off. I put a solid round of cinnamon sticks around a potted tree they'd been in and watched them run up near it and run away, trying again and again to find an opening.

Although it is fruiting otherwise your plant does not look very happy. And with trees in general distressed specimens may load up with fruits, as though trying to compensate for a likely impending future absence from the local production pool. Mango – California Rare Fruit Growers, Inc. (crfg.org)