Southern Magnolia loosing leafs
I planted a 15-gal southern magnolia 2 months ago.
It was from a container and I made sure it wasn't planted too deep and was properly mulched.
Ever since, the magnolia would keep loosing its leaves. The leaves would turn yellow then brown and then fall off.
At the same time it still buds new leaves, but it has lost 50% of all its leaves in the past 2 months.
I've given it adequate water and fertilizer (N2). Adding fertilizer helped it be more green, but it's still losing leaves at about the same rate it's regenerating new leaves.
Could it be too much watering? It's at a low spot in my yard and Austin, TX has been receiving about 1-2" of rain per week for the past 2 months.
Can anyone advise me what's wrong with my southern magnolia?