Your plant looks very healthy, and blooms beautifully. Can you describe your growing conditions? I have one that somewhat struggles. I grew it cool (outside) for several years, and it was OK but not great. So I have moved it into the greenhouse, where it does seems a bit less stressed, but its blooming was a pathetic two flowers. So I'm still looking for the conditions that will help it thrive and not just survive.
The trick might be cool nights. I have several plants of this species, and have them since year 2000, if im right. I keep them in the greenhouse. In summer day temp. about 20-42C (!) nights 12-15 C.
In winters day temp. 13-20C. Nights go low as 9 or 10C. All year about 40% shading.
Daily spraying of only roots, with rainwater with fertilizer. Thats about it!
Very reliable bloomer at same time every year. And all together same time. ( i have 5 of them)