Kent,
United Kingdom 
standard bay tree foilage turning brown despite watering. Do I need to feed it and with what?
9 Jun, 2010
Answers
And if its in a pot, how long has it been in the same pot? If more than couple of years, turn it out and repot it, it will be potbound by now and unable to get enough water/nutrients.
10 Jun, 2010
Previous question
If it is a pot, it may indeed be starving. If it is the ground, brown leaves may mean late frost damage instead.
9 Jun, 2010