Can I start flowering?

It's been 33 days since they opened from seeds... they are under a 400W metal halide that I switched to 18/6 from a 24 about a week and a half ago.... and on a 15 min on/off water cycle... with dual fans blowing on the light and on the air over the top... I have setup two fluorescent 30W underneath the canopies and am waiting to turn them on and change to my high pressure sodium for the switch... do I need to flush them with water without any nutes first before I switch to the flowering nutes? Or can I just change it when I change the water? Help me! I'm anxious to flower!!! Please!!!

I mean day 27... not 33... Can I flower? Please? Pleeeeaaasseeee???!?!?!?!

If I were you. I would definitely flower now. If you are serious about growing, don't get discouraged by the yield of this grow. I see a lot of things needing improvement if you wish to someday grow big, then do your homework here. This may just be a test run, or just for fun, but remember, you can get in just as much trouble by being a bad grower as a pro with big yields. Either way it's cultivation charges so you should always protect yourself. It doesn't pay to just fool around with it in my opinion. Do it right or don't do it at all is my opinion. Don't mean to sound like an asshole, or too cocky or discouraging, I'm just serious about it and hate to see people not growing with full potential. I learned everything I know right here and from websites like Green Coast Hydroponics (gchydro.com). You're on the right track, keep up the good work!!!!

Ok... it worked like this...

Mind Thinking:: "Hey... I should grow weed!"
Mind Thinking:: "Eh, sure... why the hell not?!?"

And I ordered some shit online... I came on here in hopes to help work out the kinks... all I have to say is, I'm chill... I'm not trying to feed Afghanistan... just a helpful hint to make sure I get ripped as balls when I shmoke this dankness would do... but thanks for the input and shmoke-tons..!!