Please help, I planted a Lemon tree with Dad a few months ago as he lives overseas and may not be able to come back to Darwin due to age. The tree was doing well until this week, leaves yellow, curled and fallen off. I fed it with slow release citrus fertiliser last week. Really confused about how much water it needs, everyone says not to water too much but it looks like it needs water? New to this so would be very grateful for help.