I have a 15-gallon southern magnolia that I planted in March this year.

It has never responded very well after it was planted: lost 1/2 of it's leaves by turning yellow then falling off. No height growth at all since planted.

In the past 3 weeks, Austin-TX has gotten more than 20 inches of rain (yes 20") and in particular, my magnolia is in a low spot in my backyard and has been drenched in standing water for a 1 or 2 days period.

Now (it's stopped raining) and half of the leaves are getting to be dark brown and there are only about 10-15 leaves left that are green.

Stems and branches also have dark brown spots all over.

The tree appears near death. :(

What can I do?

Please help me!! Anyone please !!

Thank you.