Cute Little mango tree...

Yes, the tree will eventually die "if" it gets too rootbound...you will either have to transfer to a larger pot or learn to "trim" the roots in order to grow it in a "bonsai" type growing situation...mango roots don't grow super fast but you will be able to tell by very carefully removing the plant from the container to inspect the roots to see if the roots have completely filled the pot, then you will have to decide which method you want to perform...pot it up or trim the roots?

Good luck!

Thanks! How much longer do you think it will take until I transfer the plant? Any tips on transferring mango plants (I heard they are difficult to transfer). Also, is humidity even a huge factor for mango trees, because it seems that my plant actually thrives better in the dry climate (southern California)

Its a little trickier to pot up a Clay pot than plastic (usually you can gently lift the whole root ball from plastic pots) much smoother/easier than you can with a Clay pot. Take a sharp knife and run it through the outer edges and tip the plant on its side and gently very carefully slide it out of the pot using something to guide it out gently. If you yank it out too fast/hard you run the risk of ripping the trunk and roots.

If you can do this carefully you will be able to tell if the plant is ready to be transplanted...but visually it does not look like its ready to be up potted quite yet...maybe a few more months? You'll be able to tell for sure once you check the roots. Signs of a very well rooted plant is watering daily or water running through and the plant is dry...

Your CA lower humidity means you will have less problems with diseases such as anthracnose or fungus...but the down side is our trees grow faster in FL because of our summer rains and high humidity...but during flower and fruit set it needs the "dry" low humidity to set fruits successfully so you guys have a much better climate for that.