Mango tree dying
I live in CA and am an ardent fan of mango. I bought "4080 Mangifera indica - Alampur Baneshan Mango
" from t*ptropicals. I placed this into the ground after receiving it. Watered regularly with organic soil and compost. I see that all the leaves are gone, the tiny branches are turning brown with some green in them. I am not confident if this will survive as is. Can I know if I need to do something for this to survive please?
Also, I have the mango seeds. Can I plant them into a pot initially and take care of it. If yes, what procedure should I follow.
Appreciate your kind responses for both of the questions.