My amnesia also grew super tall but doesn't form the flower well, like yours! Surely being a descendant of sativas makes it harder for it to enter flowering! Let's hope it explodes 🚀
@JuanHaze_Arg, I'm sure the buds are fattening up, it's in the phase of the autos that are flowering but still stretching, its indica sisters have already stopped growing and have more developed buds.