Adeniums prefer a well drained, neutral to alkaline soil with compost, superphosphate and potassium worked in. They are heavy feeders and plant food high in potassium, in liquid or crumbly form, should be applied throughout the growing season.
Plants in pots should be watered once a week, even twice a week if it is very hot, except in May to August (even if the bulb shrinks!) when they are dormant and cannot tolerate wet and cold soil conditions. Plants established in beds can easily survive with nothing more than rain water.
Although quite resistant to pests and diseases, Adeniums can be attacked by red spider mite, woolly aphids and scale insects. Most nurseries have remedies for these pests.
Should you wish to transplant your Adenium, leave the plant without soil in a shady dry place for three to four weeks or even longer before relocation. This is to ensure that any damaged roots have healed and sealed before replanting.