Re: Too much or too little water?
Too little water.
Water is used by the plant, evaporates from the soil, evaporates from the leaves, moves out of the root zone laterally and horizontally, etc.
Factors affecting quantity of water needed are temperature, humidity (less humidity = more evaporation from plant and soil), sun exposure, soil type (drainage), shade and sun percentages, area of leaf surface, mulch (evaporation and soil temperature control), etc. When any of these changes, water input needs to change
Water intake by the plant is affected by the amount of root mass. Intake is reduced by insufficient input (rain and irrigation), disturbing the roots (such as removing pup which reduces root mass), insufficient roots because of crowded planting space (next to a wall, driveway, etc. with no place to expand), too small of a pot, loss of roots because of root rot caused by too much irrigation.
Water inputs are rain, and irrigation.
You have pretty much maximum sun and temp. Depending on what your weather is, plenty of humidity or not much.
Here in San Diego, with 4-6" of compost mulch, a mat of bananas, with 5-8 plants, at 80-90F, with relatively low humidity gets as much as 30 minutes of water from the hose, as full flow every 4-5 days. In the winter they get very little other than rain (10" per year).
Unless you have exceedingly wet soil that holds excessive moisture, in your summers you will have a very hard time over-watering.
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