My first cfl grow

Hi everybody, I'm new and I just wanted to post a pic of my first grow. I got some clones from a friend, and I'm just using four 26W cfls. Sorry about the picture's overexposure. Web cam is not that great.

The largest one in the middle is a little shorter than a foot by now. I need to harvest these before the end of July, though. I'm moving out of my place then.

My question is, When should I begin flowering? Because I want to produce whatever I can between now and then so I dont know how tall to let them grow first.

Thanks everybody

start now if you want them in july

8 weeks minimum to flower. Yours looks part sativa which means it will likely take even longer. up to 12 weeks for maximum yeild and potency. Good luck with them all in the same pot. If you take reall good care they'll be ok but thats not ideal havin em all in there together. They look happy tho. Peace.

Thanks guys for the help. And yes it is a hybrid. Its feminized Pure Power Plant.