clay pots are way cooler ....
water in the morning hours ....
if it rains - count it as watering day ..........
water late in the day or night may promote fungus, rot, disease and unwanted insects ....
never let plants sit in a saucer of water .....
adenium are desert plants .... they live and thrive in the most inhospitable places on the planet .... including SCal ...
been 99° here last few days and may have reached 100° today ....adenium think nothing of it and ask for more ....
remember they are desert plants
switch to Terra-cotta pots .... with a drainage hole .... azalea pots are shortened versions of regular Terra-cotta pots ...Terra-cotta has an advantage of all glazed or plastic pots because they allow evaporation through the pot wall
....the less h2o hanging around the better
adenium does not need a lot of potting media ....so azalea, or shallow pots work really well ....
a layer of rock pebbles on top of the potting mix may be helpful in keeping the heat down
adenium also like a deep drink now and then - but only in the summer months...the hotter it is, the more they want to drink ....but the reverse is true during the winter months ....when temps fall below 50° ... stop with the frequent deep watering ...to once a month to 60 days watering .... and then only a fraction of the volume of the pot
summer - treat like a tropical plant
winter - treat like a cactus