Oh and if they ain't KnownFemales/clones of a Female,
you may want to load 'em up on N, without burnin' 'em.
Ya' get better chances for females is you check everything and make it right before flowering.
You can try 14 hours dark and 10 light to make them think its late in the year. indoors my plants need at least 8 weeks of 12/12.You can try to tweek the ferts,but be careful,cuz growing is like a "dope deal"-first you wait a long time,and then you wait some more...
To force flowering you can do a couple of things in unison. First is to change your lights to 12/12. This in itself is enough to trigger flowering, but the addition of flowering ferts high in phosphorous is also a trigger.
Thanks everybody. Im flowering now! Waiting to see a gender still... hoping for 2 females. Did hit them with Nitrogen, Mago, and I hope it does the job. A minor burn but a burst in growth. Thanks, brother.