Here is the picture. Browning bud stem is a sign of bud is heading toward being blasted. These are the only two buds left, I don't want to wait a long time for next round of blooming!
Out of desperation, I spread some keiki paste on the bud stems, we'll see if the boost of stimulants can kick the bud open for me...
I am not aware that the hormones in keiki-paste will accelerate buds opening (it might, but I'll bet this was just coincidence), but I can confirm that it will shorten the life of the flower.