Many herbs are more lush with some shade from the hot west sun, but their essential oils are stronger in full sun. Read your plant label or the description in this booklet for plant height. I mulch heavily to keep the soil temperature from fluctuating so much, retain moisture, and control weeds. For me, grass clippings are perfect. Just don't pile them on too thick when fresh because they heat up while decomposing.
Most herbs appreciate one inch of water a week.
Always water thoroughly and deeply, then wait until the soil is dry down deep around the roots before you water again. I don't use fertilizer in my herb garden. My soil is good and the decomposing grass clippings add organic matter. If your plants seem to have smaller, lighter colored leaves than they should feel free to use your favorite fertilizer according to directions on the label.