This customer bought these trees from me in January, it is early May when I return for another delivery and a service call about leaf dropping. The most common question about caring for citrus and avocado trees are "how do I know if I am watering enough?" "how often I should I water?" "when do you know if is wet enough?" As I have often said in the videos you should almost always see new growth, fresh leaf buds, fresh new leaves, flower buds, developing fruit. Citrus and avocado trees in the ground are best watered once a week or every other week, except during periods of heavy rain and cold weather. In general these results hold about true most of the time. If the leaves on your tree begin to turn yellow and drop a lot, then you let the tree get too dry. If the leaves begin to droop and slowly turn brown and stay on the tree it is dying from too much water.