For the past year or two I've been growing two small fruit trees, but in the last six months, the leaves have begun to dry out one by one and drop off. My Avocado is now completely bare! I've tried moving them out of direct sunlight, watering them less or more, feeding them, not feeding them, changed pot sizes and I can't get anything to work? Now they are infested with fruit flies (which I'm in the process of getting rid of) but I've never heard of them killing off a plant? Help please?
