lets start with the potting mix ....
pull the plant from the pot - mix in added rocks, pumice, pebbles, bark, large grain sand, poultry grit to the soil already in the pot ...this will make a gritty, porous fast draining mix
the faster the water drains from the pot ...the happier your plant will be
place outside if at all possible during the summer months ....
adenium thrive in hot, full sun ....but will die if subjected to freezing temperatures .... the safe low temperature for adenium is 50° ..... whenever temperatures are predicted at or below 50° - it is time to move adenium inside ....
another fatal mistake is letting the pot sit in water ...this will cause root rot
adenium are often associated with being a desert plant ....well, it is ... but as plants, they know only 2 seasons - wet and dry .... with the summer months being the wet season
during the summer months, water like a tropical plant ...in the winter months, treat as if it were a cactus - and barely water at all
outside, with temps in the 80's or so, water thoroughly once every 7 to 10 days or so ...when it warms up into the 90's step up watering to about every 5 days are so
water thoroughly means saturate the plant until water flows from the pot
I wouldn't prune this plant this year .... let it leaf out on its own
once regular watering and the warmth from daily full sun hits the plant ...new leaves will begin to emerge ...and it may even flower
oh yeah ....adenium take forever to respond to any changes .....