Adenium blooms all year round. I have adenium fans who emailed me on how to make adenium bloom as they kept theirs for many years (some as long as 10 years) and the condition of their plant is bad. Why bad? Look at the list below:-
(a) the caudex is not expanding;
(b) the plant is not growing;
(c) the branch of the plant is growing extremely long;
(d) the plant is not blooming;
(e) unhealthy leaves and constantly attacked by red spider mites and caterpillars!
Many years ago when I approached the local nursery (especially those in Kelana Jaya, Shah Alam and Sungai Buloh), none of the "uncles" are able to tell me the right way of planting. In fact, the way they teaches us made the plant rot instead! See these 4 images in these healthy adenium plant in this posting. Adenium blooms all year round when the temperature or the weather is warm (between 25 - 32 degrees Celsius. Malaysia and Singapore has temperate weather and humid. It is the best weather to grow adenium plant.
All these can be solved by the following steps:-
1. Changing the soil. Making sure the soil has enough nutrient for adenium. I have been supporting and advocate on the importance of soil being used for adenium plant.
2. Using proper pot. Change the soil and pot every 3 - 5 months as the plant grows. Remember, if you don't change the soil, the chances of rotting is higher.
3. Trimming the plant is an important procedure to make sure the plant grows well. Do this during hot season, not during wet season.
4. Using the proper fertilizer. Many of us got carried away whenever a nursery staff recommending an organic or in-organic fertilizer for adenium. Those who visits www.desertroseking.com are knowledgeable people. Many of those who have contacted me are from higher level position white collar workers. One on thing for sure, it is important to learn the difference between N,P,K, the ingredients used for fertilizers. Our Quickgrow 353TE are specially formulated to have a low amount of Nitrogen content. High nitrogen makes the plant grow tall but since adenium has "caudex", which is different from normal plants, it can't grow big, therefore its branches grow long and wide (you can see Balinese loves long arm branches for these type of plants). For us, Malaysians & Singaporeans, this makes the plant really "ugly" and sometimes your wife or husband will ask you to throw this plant away!!! My folks used to say that to me years ago when I plant adenium as a hobby.
Once you get the above right (Item 1 to 3), your plant will be at a very healthy state and adding Item 4 is a boost to your adenium plant.