For many years my wife and I have tried growing citrus and apples, and the same thing always happens:
They start out nice and green and in about 3 months the leaves are ripped up and yellowish and start to fall.
We do have strong winds in the area as well as wild rabbits which inhabit the yard (could the rabbits be eating the roots?) Or is it the soil? drainage? We can't figure it out.
We were told not to water too much, so we hand-water about once a week, or just check to see when the soil is drying out. We fertilized quarterly at first, we put in good soil to begin with ...
Our best guess is that strong winds or poor soil is the culprit. We've tried many times. Ready to give up on fruit trees altogether.