Thanks butterflyice!!! I am not sure of the 'science' behind it.. but this is what I have noticed since last few years. It remains as a bud and waits for the first shower with thunder and lightening.. when the rain arrives, it starts blooming and is in full bloom in 2-3 days!
Beautiful blossom! From my experience, I see different types of lilies grow and bloom overnight due to thunder, and lightening!