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Reload this Page photoperiod manipulation for larger yeild
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Old 02-19-2009, 04:34 PM
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Originally Posted by slingblade View Post
i never tryied that my hybrids are 4 weeks in so wait 2 weeks n give 30 min extra sounds good

Its my second 12:30 cycle tonight i'll keep ya posted let ya know how it goes
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Old 02-19-2009, 09:21 PM
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I sounds like a solid idea and in theory should work if the 12hrs of darkness is what keeps it in flower, so I think that I will take 3 clones and give it a try on the next grow, besides I figure worse case scenario is the plant reverts back to veg and it sets you back a month but either way higher yields. do you think that it would be best to stage it up to that point or just go from 18/6 to 12/12 to 21.36/12? also where did that number come from 21hrs 36 min seems like a weird number why not just 21hrs or 21.5hrs
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Old 02-19-2009, 11:42 PM
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I've grown the same strain from clones now for the past 4 grows. I tried doing 13 hrs on 11 off last grow and I did see a slight increase in yeild. this could have been that I have become a better grower, but I think it may have been the lighting. My current grow is on 12/12 and will ending in a few days. Lets see what happens.
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Old 02-20-2009, 06:26 AM
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I've grown the same strain from clones now for the past 4 grows. I tried doing 13 hrs on 11 off last grow and I did see a slight increase in yeild. this could have been that I have become a better grower, but I think it may have been the lighting. My current grow is on 12/12 and will ending in a few days. Lets see what happens.

Cool bro, the vid I watched that told me about that said on some strains the light cycle can go up to 14 hours of light the last 2 weeks. I didn't wanna push it so I'm just doing 12:30 to try out
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Old 02-20-2009, 07:59 PM
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Originally Posted by doctorchaos555 View Post
I don't remember where I read this and don't even know if its an actual fact but there was something I read that explained how a plant recongizes when to veg and when to flower not based on how much light it gets, but how much dark time it receives. Theres a supposed chemical process that occurs at night and when the plant recognizes that theres a certain amount of night, then it should start flowering or whatnot. It's interesting because what if you doubled the energy that it absorbs in a "day"? Another interesting point is it can help find out more about photocycles for plant life on other planets cause well, plant life seems to start with the light cycles and its manipulation. Keep it up man, I'm subscribed. I got my baby under 12/12 right now waiting for sex signs. But when I find out it's sex and it's female, i'm gunna up the light cycle to maybe 24/12 or 18/12, or even 36/12, to see if the absorbing energy makes a diff. Also another thing I read is that plants grow at night with the energy they collect during the day. I'll let you know how my findings are as well.
Yes plants collect light during the day and they actually do there growing at night. Just read it in biology book and it was talking about seeded flowering vascular plants or angiosperms.
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Old 02-21-2009, 12:32 AM
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I've read this quite a few times, both here and on other forums,
It's been talked about over and over but I'm yet to see anyone
post that they have actually tried it, or results of any kind.
So for this reason I take it with a grain of salt.
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Old 02-21-2009, 08:41 AM
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In last months High Times they had an article about a "master grower" somewhere in Cali. He sets his lights to 13 on and 11 off about 2 or 3 weeks into bloom for about 2 weeks, he says the extra light along with a bloom enhancer like Big bud or something like it sends the buds into overdrive. He also kills the lights for 72 hours right before harvest, says it increases flavor and coloring dramaticaly. I don't know about the 72 hour thing, that kind of scares me, but I'm going to try the 13/11 thing.
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Old 02-21-2009, 09:04 AM
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i would be more afraid of the 13/11 period than the 72 hours right @ the end. 72 hours of dark right before the plants transforamtion, what could go wrong in that ammount of time. I actually will do this in the next couple weeks as soon as the trichs on my durban poison are done growing. i just wish i had another one to pull at the same time to compare it to vs one that stayed in "normal" conditions for the 72 hours.
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Old 02-21-2009, 10:15 AM
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Finished 3rd night of 12:30/11:30, so far plants looking great. Their growth is quite noticeable on a daily basis still, and no signs of seeds
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Old 02-22-2009, 10:48 AM
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Originally Posted by satan's dalmation View Post
i would be more afraid of the 13/11 period than the 72 hours right @ the end. 72 hours of dark right before the plants transforamtion, what could go wrong in that ammount of time. I actually will do this in the next couple weeks as soon as the trichs on my durban poison are done growing. i just wish i had another one to pull at the same time to compare it to vs one that stayed in "normal" conditions for the 72 hours.
not for sure but I think that the 72hrs of darkness is not for growth but to help the plant flush of chlrophyll since there is no light the plant stops making it and starts to also feen on reserve nutrients, also flushing it of other trace minerals
 
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