adeniums in their native habitat have only 2 seasons ....wet season and dry season ....
wet = summer
dry = winter
the wet season is the growing season ....adeniums not only tolerate 100° temperatures, they thrive in it ....
conversely - too much water and freezing temps will kill adenium ...
during the wet season is when adenium store up water and nutrients in the caudex ....then use this resource during the dry season, when temperatures drop to just above freezing
in the summer water like a tropical plant - to saturation
in the winter ...very limited, to zero water ....when in doubt, stop watering altogether