nichka:

You can't grow a mango tree in a little pot. Mango trees get 40 feet tall. You could not expect the tree to fruit in a pot, no matter how large the pot.

Don Yellman, Great Falls, VA

That is not at all true. Many people grow mango's very successfully in pots. Including myself.

As for the original post, I am sorry but I can't help you. You may have better luck if you post in the tropical fruit forum. My only suggestion would be to make sure your mix is very well draining and don't let the pot stay too wet.

Are you watering it enough? Does it have enough mulch? Is it getting full sunlight? My mango trees are all in pots, and they dry out much faster than they would if they were in the ground. The drainage from their potting soil is excellent, so it's possible to push a little more water to them than if they were in the ground. In the heat wave we're having, I have to water almost every day. The leaves on one of my trees started turning brown on the tips- I'm guessing from not enough water.