As can be seen from that photo, those are some plants l've got (the plants to the front are avocado plants which I've grown from seeds, the plants to the back are a a variety of oranges given to me by someone, and there are a few tomato plants as well). I usually water them about once every 2 to 3 days. I even leave them for a week without water, when there is a lot of rain fall (note the plants are covered from being wet by the rain), the reason being if you look at the photo you'll see there is a layer of light brown dirt at the top, when it drys the moisture in the container is trapped, thus there is almost always water available for the plant(and no the roots aren't drowning in water ). Even under these conditions I haven't seen any rotting of the roots taking place, I shall continue observing and update on whether or not rotting of the roots occur.
Those a just a few of my plants, I have sown some pregerminated portugal seeds which are growing in cow manure, I'll update on those later this week.