If it gets the slightest bit dehydrated the leaves die.
That has been my experience as well.
Even though basil is a Mediterranean plant, it doesn't seem to like dry growing seasons.
For flavor, I have 2 suggestions:
Basil and tomato are a great combination in the kitchen AND the garden.
Their marriage
should begin in the garden...honeymoon in the kitchen.
Also,
yarrow (
Achillea Millefolium) stimulates the production of essential oils in most herbs.
It is these oils that give the herbs their flavors.
I believe that yarrow belongs in any herb garden specifically for this reason.
(If you want super mints, this combo will
boost the mintiness in the plants)