I had also heard that Buxus sempervirens was not the best plant for a mediterranean climate.
However, I thought I would at least try some.
I have two in pots, and three in the ground.
The two in the pots get watered weekly, and the three in the ground are watered once a fortnight during the summer, along with the whole garden.
One of them gets some shade during the day. The others are in full sun.
They have only been planted for one year, but so far, they are all well, happy and thriving.
The only care I give them, is to clip them in the early evening, so that the cut edges do not burn.
Daisy