i need serious help

Hello i am currently in my first grow. I need to start to flower as soon as possable becasue my plants are getting too big. My smallest plant in only 9 1n. tall which still needs a while but all of my other ones are 11-15 tall. I have been reading posts on here that say eather wait for preflowers or alternating nodes. Mine do not have any at the moment. Here is some info on them i am growing 4 snow white, 5 wounder woman fem. 2 ppp fem. and 3 bag seeds. I started with so many becasue i expected to loose some since its my first time, but they have just taken off like crazy and are on the 11 or 12th node. my grow room is 4*4*6.5 and using 400w hps when i start flowering will be adding a second one. Any and all feed back would be great thank you here are a couple of pics from yesterday.

ur doin a great job so whats the question mate

Sorry i need to flower them by 18 in but from what i read they are not miture so i do not know if it is worth it and thanks for the quick reply

flower u get 3 times the size so think of that and any more question and they will work great tust me i flower 1 foot plants turned to 6 ft after i was done

Flip those bitches, I'd cut off some of the bottoms as well, it looks like it'll be a pretty full canopy, they look nice so far
good on you

thanks for the replys i guess im still expecting for something to go wrong and was just being to ahead of myself with switching them to flowering

Its always better for yield to wait for pre-flowers in order to make sure that the plants are fully mature and ready to flower BUT since you have so many, your chance of getting a decent number of females is good and so even though each plant will produce slightly less bud, you will have a many of them.. forcing them into flowering right now is just FINE. Go ahead and do what you need to do, as babyboi said, they will get larger through the first few weeks of flowering (although skeptical about the 3X comment -- more like 50%-100% more growth max .. heh).. flower those thangs.. just take clones of them all before you switch to flowering and keep track of which clones belong to which mother so you know the males from females.. good luck!

so ill be going to the local hydro shop on tuesday pick up some bloom nuts and flip them over......is the additional co2 worth investing in i have two huge tanks already(i live in what use to be a bar and they left two full ones) i gust need to get a regulator so input on that would also be helpful