When I got home from work yesterday, the flower had fallen off. It opened on the 17th of July and fell off on Aug. 2nd. I don't know if that is the average life span of a Psychopsis flower or if mine died prematurely. It was beautiful while it lasted and the next bud is already swelling. Can't wait until it flowers again.
Yes, that can be normal for some environments. 2-4 weeks. Maybe the next one will last longer! I find that when open opens, I'm best not to disturb or move it etc if I can avoid it.