ok i vegged for 4 weeks, then switched to 12/12 lighting. That was now 16 days ago, just over 2 weeks - still no signs of flowering... any advice?

Will plants still flower using 6400K lights? (CFLs)

help!

Yes they will flower under that spectrum, although it COULD take longer? I would say the first thing to check for is light leaks... making sure NO radiant energy is entering your grow room during the off cycle. That will confuse your plants and they could still be attempting to metabolize when your lights are off...other then that... are they still showing signs of Vegetative growth? or are the completely stunted? Have you switched to your Flower feeding schedule?

__________________
Grow Journal: http://www.rollitup.org/grow-journal...oejam-big.html

are you sure you sexed them right?

i would think that four weeks isn't all that much veg time... i have heard that it is recomended to veg untill the plant shows pre-flowers, and if put into flower before a plant shows preflowers it can stunt a plant and reduce its overall yeild... there is not much you can do to speed up the flowering process, it is just one of those things that take time..
as far as flowering under those bulbs, i think you are fine.. the way i look at it is that alot of people veg under hps which are more of a red spectrum and better suited for flowering... and a lot of people also do the reverse.. flower using mh bubls which are in the blue spectrum and better suited for vegetive growth, but both achieve good results either way..
best of luck... you could always just do a search for cfl's and i am sure there are tons of threads and people on them who could also help you out with any further ?'s..

A plant will only flower once it is mature enough, 12/12 wont make a plant flower that isnt ready. 4 weeks apparently wasnt enough veg time. It will keep vegging under 12/12 until its ready. And 2 weeks isnt really that long to wait to see hairs.

light leaks is very possible, ive covered up the major areas where light could get in, but there are still a few small areas.

Still getting vege growth, however it has slowed down a lot.

Im not using any nutes because i had some nute burn developing, so just cut out all the nutes - the compost had enough for 6 weeks growth it said

They are feminised seeds - Super Silver Haze... is this a longer strain?

how long should i wait before you think there's a major problem?

Also, any advice on pruning? lots of bushy growth down below - i was told to take that off?

Ohhh, haze is a 12-13 week plant i believe, so yes it is a very long plant, that could be it, just a slow flowerer.... Hmm, Idk if it's possible for something such as this to turn in to a major problem, sounds like its just taking awhile.. Plants stretch a lot through 3-5 weeks of veg, especially hazey sativas... also, you can prune those bottom branches if they arent reaching effective PAR, this is called lollipopping because you create a lollipop style plant with huge top colas and no undergrowth, very efficient. Take pictures over the next couple of days and you will probably notice more flower activity...

__________________
Grow Journal: http://www.rollitup.org/grow-journal...oejam-big.html

I would give it another week. If you still dont see any hairs or bud sites forming fix all the light leeks, and then leave the plant in total darkness for 24hrs. Then start with the 12/12 again.

__________________
Everything I post is a a lie! All pics are from the net!

If its not flowering and its still vegging then the only problem you will run into is the fact that you are vegging with half the light you could be. You can leave it on 12/12 and wait for flower just might take longer.

You should add some 2700w-3100w cfl's to your grow. The 6400k is for vegging. They will flower, but you wont get much. If you want to d Plants can take 2 weeks to show preflowers, but yours will take longer because on the lights you're using.

You can flower from seeds if you use hps or low k bulbs. Ideally, plants should veg 4-5 weeks, but that's not necessary to flower. That guy is 100% wrong.

__________________

I GO HYDRO!