Avocado leaves turning brown
I planted a 3 ft Choquette avocado tree in March. It thrived with lush green leaves on it's dozen or more branches. Then 3 weeks ago I fertilized it for 2nd time and started thoroughly watering it twice a week. Previously it got watered maybe once a week at the most, other than the occasional rain. Now suddenly, about a week ago, 3/4 of the leaves started turning brown and curling up. I immediately stopped watering it and it seems to be in a state of limbo now, with all the leaves, including the still green ones, hanging limp. Am stumped,..anyone have any ideas ?