Need Help! Plants not flowering after 2 weeks

[Grow4Flow]

I know this has probably been asked many times but i have read all the info pertaining to this already and it does not pertain to me.

My plants ARE absolutelyfemales.
I have NO light leaks.
My temps 70-80 degs day-night.

I have been growing off and on for about 15 years with big breaks in between and this has never happened to me before. This is however, My first time using Aeroponics though not TAG.
I have grown many strains but these are new to me (Grape Romulan, Grapefruit Haze, Chem dog). My Plants are extremely healthy and dark green but no flowers after 2 weeks already and its puzzling. I just started using Lucas formula for the first time so there are a couple of new things im trying with this batch and they are under 600w lamps.

I am open to any suggestions, ive read many posts on many forums of people having this problem so its not uncommon but I have read nothing of successful remedies.thanks in advance.

 

[PetFlora]

YOu might find some answers in my journal. Mine were 2 weeks before showing any signs of sex, then in one week BAM pistils everywhere.

 

[EvilTwin]

Hi Grow4,
Too much N will delay flowering...and of course if they are full-on sativas, they can take longer too.
ET

PS: Just recalled the old trick of several days of dark as you trigger flowering. Usually that's done before turning the lights down so I don't know if you could do it now.

 

[Grow4Flow]

YOu might find some answers in my journal. Mine were 2 weeks before showing any signs of sex, then in one week BAM pistils everywhere.

PF,
These were grown from clone so there are already pistils everywhere.

 

[CovertCrops]

You could hit them with some bushmaster. It will get them flowering quick.