are my plants mature enought to flower

[OmegaVermelho]

Sure, the spectrum should be predominately blue, but all blue? I'd like to hear more on this because I don't believe using red spectrum in the blue phase, as long as there is blue spectrum being used............. would affect the plants sex so significantly.

I dont really understand what are you trying to say but anyway ...

Blue spectrum = Veg cycle (if both spectrums are present, better)
Red/Orange spectrum = Flower cycle (if both spectrums are present, better)

The above is not a "must", some growers have their plants all the way with one spectrum usually when using HPS bulbs, some growers use a new sort of lamps wich puts out a purple spectrum (blue/red), some use a mix of fluoros all the way through out the grow making sure that in the dif cycles they use more of a type of specific spectrum....