First of all remember that in a warm climate like yours containers should be a little larger to allow for more soil volume to hold moisture. That way you won't be watering twice daily trying to keep them going. There are many plants that will do well in containers with some tolerant of heat and others better suited to cold conditions. Also consider using plants for foliage. I like to use Purple Heart which is very heat tolerant and trails over the sides of the container. It likes part day shade but tolerates sun too. The trailing zinnias (narrow leaf zinnia), work well in summer as does fan flower (Scaevola). Blackfoot daisy is good if you can avoid soggy soil conditions in the container. Purslane is another good choice.
See the following web sites for more ideas:
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