start week 6

So my big plant is now over a foot tall and the little guy that i topped and trimmed is about 8"... i have about 2 feet left of grow upwards in the closet... i think ill be ok to start flowering today just want a few second opinions.

I have gone out and purchased the low spectrum cfls and tubes I will need. my next watering will be without nutes... i guess if i have one question is when to start the flowering nutes? do i wait til i see the flowers or if i do start to flower today just add it to the next cycle?

here are a couple of pics of what were looking like this morning.