wannabekush has it down man. Get yourself a pH test kit. Chances are if you're using tap water then ur pH is going to be way to high. Next you can probably use a little more Nitrogen so grab some nutes (25-5-5 is a good place to be in the beginning at about 1/4 strength) You probably need to water ur tree a lil less but if it looks a little unhappy grab a spray bottle and lightly mist the leaves. Make sure your pH is adjusted to around 5.5-6 and don't use nutes on the leaves. I hope some of this helps. If anyone disagrees with anything let me know so I can double check my sources