how long do i leave light cycle on 12 12?

[playstationweed]

ive been on a 18/6 light cycle for a month now when should i switch to 12/12? and how long do i leave it on 12/12?

 

[frmrboi]

:when should i switch to 12/12? and how long do i leave it on 12/12?

when you're ready to flower, and then you leave it there 'till your done.

 

[Erdericks]

To elaborate on frmrboi's reply, when your plants are grown large enough, hopefully not too large for you blooming space. They will grow in 12/12 approx Double to Triple their current size.
My Clones get to approx 12" tall then I put them into Bloom end result is usually a 36" tall plant approx, maybe a little bigger but with excellent conditions and assuming I did not mess up the PH, PPM, Temp, Timer, Humidity, light height (I Almost burned up a main cola on my first grow 1000w HPS too close)

Good Luck!

 

[jawbrodt]

Exactly. Once you switch to 12/12, they stay under that schedule til they're completely finished.