24/0 vs. 18/6

[Dan42nepa]

I am growing northern lights organic in soil and am in week 6 veging under a 400w MH 24/7. There is another person growing the same strain (different breeder) who is also organic, using same lights but does 18-6. His plants are taller but mine have more dense undergrowth. His plants are about 2 feet mine are now about 16 inches. I can only reason the strain, soil and light schedule are causing the difference. My guess is the light schedule. Here are mine.




This is his thread.

http://www.icmag.com/ic/showthread.php?t=42627

 

[Guest]

This was a discussion on og quite frequently....

I have 2 cents so Ill throw it out there....

For a mother plant I think 24-0 is the cause of some of the pistils....
I think its a really bad idea....

When I reveg plants I will give them 24-0 for a week or so...

then after that I give them a dark cycle....

Older plants especially seem to get confused on 24-0 and begin producing pistils...

However... it also seems to me in my tests that seed plants given 24-0 actually show sex before those with a dark cycle....

For some reason it seems to me that a 24-0 cycle produces a plant that wants to flower.... just a little bit.... just enough to be negative....

 

[Guest]

Though a lot of people think the opposite because in 18/6 there are some dark hours involved,what you say is absolutley true.I noticed this when I used to keep moms and have heard others mention it.24/0 seems to produce pistils before 18/6 will and pistils are a cuttings worst enemy

 

[Guest]

That is the benifit to 24hr light...sex shows earlier!
Even with constant light cannabis seems to go thru its daily cycle ie: drooping leaves at dusk. And then in the morning perky and ready to greet the day.
Roots grow denser in the soil 18/6...definatelly! But I dont smoke roots...lol.


Willie!

 

[highasakite]

18/6 man i know we would not like it if it was light 24 hours a day

 

[stealthballer]

my plants have always done better with 18/6 but I actually veg for a month or so under 24 hour then I switch to 18/6 and my girls explode after only about a week of that then I flower.

 

[Dan42nepa]

my plants have always done better with 18/6 but I actually veg for a month or so under 24 hour then I switch to 18/6 and my girls explode after only about a week of that then I flower.

Interesting.. I dont want to flower for 2 more weeks.. Maybe I will try it next week.

 

[bbudd]

veg time

veg time

I found that some plants started to show there sex with even a 18/6 change from a 24/7. What I found even stranger was the plants closest to the ladys in flower seemed to show male predomintly-anyone else seen this??

 

[Guest]

I would go with either 18/6 or 20/4 simply because it is unatural with 24/0.

Alternatively you could start with 24/0 and gradually drop to 12/12 to simulate outdoor conditions in order to easy the plants into flowering and give them time to adapt. As the opposite of vegging 24/0 and then abruptly changing the photoperiod to 12/12 to induce flowering. It's unecessary stress in my book.

Besides I actually saw better results with 18/6 over 24/0 anyway, which I think is due to the fact that plants need some rest in order to metabolize energy between light and dark reactions of photosynthesis.

Not sure though as photosynthesis is quite complex

 

[Lumpy]

Great info everyone!!! after a few weeks we decided as well as many others from reading these posts to switch to 18/6 after 3weeks of 24/0 ill see if my expierence is the same or as good as yall do!!

 

[dwtc]

don't know if this has been asked before, if it has sorry for repost.

are the chances greater with 24/0 to have hermies, does it put unnessicary stress on the plant? thanx for the reply.


stay safe,,,,dwtc

 

[Bermyboy]

It seems like what needs to be done to solve this debate is get several people to do side by side identical grows of a very stable strain, and keep one on 18/6 and one on 24/0 and run a timelapse. Because as it generally seems to be with cannabis, since it lacks a lot of scientific study, we are getting very differing opinions, and no real proof really from either side, just anecdotal evidence. Until proper experimentation is done we're all just going to sit around and go back and forth with eachother on it and never really get anywhere.

You are absolutly right!

 

[Elevator Man]

I keep my vegging time to 16/8 permanently - partly to save electricity, but mainly to 'acclimatize' my plants to a lower 'virtual latitude' - part of my experiments to force more sativa expressions out of my hybrids. I figure that 16/8 is the maximum daylength at about 40 degrees N - Northern Cali, Spain, Morocco, etc., instead of 18 hours (60 degrees N), which is the Shetlands, Canada, etc.

So I keep many of my plants in a state of 'almost flowering' - all will flower within 5 days of changing to 12/12. For example, this NL X BB is on 16/8, and always generates small buds on lower branches on that photoperiod - also, it's a good guide to how much indica is in a given strain:



Next grow, just starting, will run for:
2 weeks on 16/8
1 week on 14/10
1 week on 13/11
4 weeks on 12/12
1 week on 11/13
1 week on 10/14

I might extend the mid-period to five weeks of 12/12, but I don't think I'll need to - I predict that some of my strains will have started flowering by the end of the 14/10 week, and all will be at the end of the 13/11, giving me many more hours just when I need them...

 

[mhlife1975]

i always veg 24/7 then i switch to 12/12. My plants are doing pretty good for the frist ones

 

[dwtc]

don't know if this has been asked before, if it has sorry for repost.

are the chances greater with 24/0 to have hermies, does it put unnessicary stress on the plant? thanx for the reply.


stay safe,,,,dwtc

????????

 

[GZA]

21/3

 

[Maj.PotHead]

18/6 from seed planted on clones get 18/6 also mum's, in flowering get's 12/12



schroom approx 5wk from seed planted 18/6 thats a 2gal rootmass oh yes and w/cfls lol

 

[70s_PotHead]

I've always used 18/6 when vegging and 24/0 for rooting clones.

Does anyone use 18/6 to root clones?? If so do they root any faster/slower?

70s

 

[Guest]

I use 6 hlours of dark even though they are under flo tubes,I've done 24/0 not much difference I can see I just like a little dark for the plants

 

[George]

i noticed a difference in growth from 18/6 to 24/0 but not in the sense of actual speed. speedwise they grew the same IMO. they just grew bigger quicker in the 24/0 since they were getting the equivelant of a week's extra growth after like 30 or 35 days or somethign like that. dont remember the exact number of days.