Citrus trees can be finicky, its taken me a while to properly care for my citrus trees so they do not produce tons of yellow leaves, drop their leaves and die.
I tried growing a tiny regular lime tree with clay pellets in a semi hydro solution. It seemed to be growing good during the summer, but then I did not keep on top of changing the solution regularly and so it slowly lost all of its leaves. If you have good liquid fertilizers give it a shot
