SHould I do anything with this? I have the 3 infls off to the sides that are dark on the top and not appearing to do anything and the one that popped out the middle grew really long and sprouted 2 stalks
Flutter
My plumeria
Flutter, Hetty is right. I think you have your terminology mixed up. Your inflo (flower stalk) looks great, but your two branch tips -- I can only see the two -- have a problem that looks like black tip, but they also look like they are sprouting side branches so you don't need to do anything.
