What a fantastic climate you have, I live in cold miserable London UK.
Well, the sky is the limit, and yes you can certainly have citrus. You could have a lemon tree, lime tree and a small apricot tree. You want to look for specimens that are classed as miniature, that is grafted on dwarf rootstock. If you go to
www.bakker.co.uk this is a fruit/plant company and although in UK if you search for 'fruit trees', you will see all the miniature ones in pots to help your planning and give you ideas. With your climate you could even have an olive tree, they live for over 2 thousand years - awesome!
You will have no trouble with herbs, as most we use are mediterranean and love dry heat. However, salads don't like intense sun and I would pop those in a shady spot. Your tomatoes and peppers, bell and chilli will do brilliantly. You could also have mange-tout, or snow peas growing up a trellis the flowers are so pretty. And dont forget your edible flowers such as nasturtiums, Water at the beginning of the day and at the end of day.
Last but not least don't forget the Goji berries, they come as a small bush and are really easy.
It is always useful to have a snoop at other peoples gardens, what grows there will grow for you. If water is limited you can water your plants with 'grey' water, that's water from your washing up or bath, plants don't mind this at all, and dowsing them with soapy water deters pests.
Good Luck!
p.s. there is a fabulous US seed website called something like Ed hulme seeds. Fantastic selection.
RG
