Avocado losing leaves
I have planted a Brogdon avocado last fall. It has been doing pretty good, no frost damage, flowers in February, new growth, but it suddenly lost almost all of its leaves. I have put some Mango/Avocado fertilizer on it in March and mulched it with oak leaves.
Does anyone have any idea what may be the problem? Fertilizer burn or a disease? Too much or too little water? What could I do to nurse it back to health? Thank you,