how do u kno when u should start 12/12 lighting on your plants?

4-6 weeks of veg.growing or your plant is 12 inchs in height are better

its not all height.....u should also go by internodes. at leave 4-6 internodes before u flower...

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Everything I say is a lie. Pics are from the net......
http://www.rollitup.org/grow-journal...rt-flower.html

Start 12/12 when plants are sexually mature. Plants will indicate there maturity by beginning to alternate nodes. Early on the plant will grow symmetrical nodes that is one on each side opposite each other. When the plant matures it will begin to alternate nodes that is growing one, then another opposite it on the stem a little higher up then another. Good luck.

i veg for roughly 4 wks and by then i have little hedges lol. usually i start 12/12 when my plants reach a hight of 12-16 inches but as sunny said the more nodes the better..

i flower when mine have 4-6 nodes n sumtimes more , get ur light as close as you can so they dnt stretch. i have my ilghts roughly 18 inches above them n when they grow an inch i raise the light an inch..
easy peasy lol..

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http://www.rollitup.org/grow-journals/49770-white-widow-bigbud-afghani-hydro.html
every thing i say is all lies and all the pics ive posted are all stolen from other ppl.