Question
I have two large bay trees in pots whose leaves are yellowing and falling.  Can you tell me what action I should take to prevent this?

Answer
Shirley,

These type of problems are difficult to diagnose over the Internet.  Trees will drop their foliage in response to some stress.  It could be decreasing and light and temperature that is experienced during the fall.  It could be the pots have dried out a bit and the water stress is the cause.  Take some of the leaves to your local extension office for a diagnosis.

Good luck

Gary