Question
Hi Gary.  I have a Bay tree growing outside in a fairly large pot. It has done well for two or three years but has recently developed brown patches in the centre of many of the upper leaves. Does it lack some kind of food please?
Thanks for your time.
John Weir.  (UK)

Answer
John,

It could be a couple of things.  It may need fertilizer.  How often do you feed it?  It also may be becoming rootbound, where there is not enough space in the pot for the rrots.  In this instance you will need to transplant it into a larger pot.

Good luck

Gary