24/0 vs 18/6

[darbolah]

bored

[SimonSaysSmoke]

Im a noob.. By 18/6 are you saying on the 7th day no light at all?? Why is that is the main question??? what purpose does it serve to do that? why not just 18hrs each day?

[Fencewalker]

18/6 means 18 hours on and 6 hours off, each day.

It's been established for many many many years now that cannabis is a C3 plant. It does not need a dark period.

C3 plants gather CO2 only during the light period when they are photosynthesizing. As long as the light is on, C3 plants gather and use CO2 for photosynthesis.

Some growers practice a version of anthropomorphism with their plants. They believe that since people need rest, plants do as well. Concerning cannabis, this is not true.

Every grower can make a personal choice about light cycle. They can save on their electric bill or prolong ballast/bulb life. 18/6 can be less of a "shock" when changing over to 12/12 for flowering than 24/0 or heat issues can be addressed by fewer hours of light, but basic botany has proven long ago that cannabis needs no dark period.

Ed Rosenthal, Mel Frank and Robert Clarke all have covered this extensively over their careers.

Marijuana Botany Chapter 1 - Sinsemilla Life Cycle of Cannabis
Need the dark

[stra8outtaWeed]

http://boards.cannabis.com/basic-gro...ales-seed.html

:thumbsup:

[Rusty Trichome]

...but basic botany has proven long ago that cannabis needs no dark period.

Really old thread, but...
24/0 is possible, but in no way is it better.
In my garden, I've tried both ways on more than one occation. Never will I go back to a 24/0 schedule. It doesn't make for faster harvests, doesn't make the plants bulk more, doesn't taste 'better'. The only good thing I like about 24/0 is when rooting clones. But then you have to closely monitor moisture levels in the clone tray.

Nice info, stra8outtaWeed. :thumbsup:

[stra8outtaWeed]

i know it was an old thread but i see folks reading it and just bugs the hell out of me to have erroneus info here...the only reason i run a longer light schedule is i have one plant if she gets 6 hours of darkness she is trying to flower so i run 22/2 to give em a little rest! :jointsmile: