A while ago I attended a seminar by Mark Dimmitt, who recommends a fertilizer that is 1:2:3 in relative terms of N : P : K. In his book on Adeniums, he also states that he knows of Adenium growers that use potassium nitrate soil drench at 1 tsp/gallon to induce flowering.
Nitrogen is known to encourage foliage growth and suppress flowering, which would appear to make the use of Potassium nitrate somewhat contradictory (which he notes in his book as well). P and K produce strong cells, stems and roots, making for more robust plants that are less prone to breakages and disease/pests.
