The origin of the Beaucarnea is the (sub) tropical areas of Asia and Africa. The Beaucarnea grows mainly in dry areas on rocky ground.
The Beaucarnea is like a light spot but partial shade also. Rather in the summer no direct sunlight.
Once a month is sufficient in the summer diet.
Generally moderate watering in the growing season that runs from March / through August just as s-winters. You can just let the soil dry out before watering again. But let the roots are not in the water, this causes root rot.
The thickening of the stem is buffered water. This is also the reason that he just can without water.