I have a lime tree in my yard, we have it planted in a pot, and the water supply is off my sprinkler system. The tree looks healthy, green leaves, some light green. This is the first year we see more than 5 limes growing. The issue is, when we cut the limes open, the center is the size of a dime. And that's if the lime is the size of a baseball. If we cut open a small one, it has almost no center. What do I need to do?