18 or 24

[jackh49]

18 or 24 hours for vegging?
Which and why GC?

[SmokinTrichs]

What kind/strain of plant are you vegging and how old is it? What is it's grow medium?

[bouldernugs]

do 18. 24's not really worth it. i'd do 24 if you are rooting clones, but for vegging, give 'em 18. if you do 24 they take longer to sex and i feel as if they transition slower from vegging to flowering.

[jackh49]

Originally Posted by SmokinTrichs

What kind/strain of plant are you vegging and how old is it? What is it's grow medium?

Soil , the strain is white widow and I was just wondering about the pro's and con's of both light methods (18-6 and 24)

[mcinnc]

I vote for 18/6, all day! well... atleast 18 hours of the day.

[mcinnc]

oh yeah.. why?
because you can.
and why pay for that 6 hours of extra light, when you DON'T have to?
18/6!

[jackh49]

Originally Posted by mcinnc

oh yeah.. why?
because you can.
and why pay for that 6 hours of extra light, when you DON'T have to?
18/6!

From what Ive heard here on the city 18/6 is the way forward. Im just asking this because my friend read me a passage from the cannabis grow bible (don't no what edition it is) and it says 24hrs

[S.F. Sage]

I think you should read this info in a thread I posted awhile ago http://forum.grasscity.com/absolute-...eforeskin.html

[mcinnc]

Fuck Ed R. is he paying for your energy bill??
18/6 until he does.

[Rumpleforeskin]

What Ed Rosenthal said is you don't save any power using the 18/6 light cycle. You just grow your weed slower. I happen to agree with Ed on this point.


Need the dark


by Ed Rosenthal. Posted on Thursday, October 23 2003 11:00:00 PM

"Do plants need a dark period during the vegetative cycle?"


Does marijuana require a dark period during the vegetative growth stage? I recently read a grow book that advocated an 18-6 light cycle during the early growth stages.


One way in which plants are categorized is by the way they gather and handle carbon dioxide. Cannabis is a C3 plant. It uses the CO2 it gathers during the light period, when it is photosynthesizing. Plants designated C4 also gather CO2 during the dark period for use during the light period. Many C3 plants, including cannabis, do not need a rest period. They continue to photosynthesize as long as they are receiving light.
The plant's photosynthetic rate determines its growth rate because the sugars are used by the plant to build tissue and for energy. Cannabis under continuous light will grow 33% faster than the same plants on an 18-6 light regime.
Readers with grow questions (or answers) should send them to Ed at: Ask Ed, PMB 147, 530 Divisadero St, San Francisco, CA 94117, USA.
You can also email Ed at AskEd@cannabisculture.com and send queries via his website at www.ask-ed.net.
All featured questions will be rewarded with a copy of Ed's book, The Big Book of Buds.

[halitzor]

C'mon guys this is a frickin no brainer....



c3 plants (cannabis) does not need a dark period. It does not work like c4 plants where they gather CO2 during the dark period to use during the light period. Cannabis can use it all the time.

What that means is if you veg 18/6 it will take you 43 days to reach the same size of a plant running under 24/0. Which will be the same size as the above plant after only 30 days of veg.

Both methods use the EXACT SAME AMOUNT of electricity, you just put your harvest off by at least 13 days is all.

Clear now?

[mcinnc]

(in order of posts)...
Well fuck... The One person out of a select handful on GC i will NEVER argue MJ with....
Mother Lickin' Rumpleforeskin....
atleast i got a GC legend up in here!!
and now.. i must be going.... to go wipe the pats off my back and change my timer....

nah i'm not changing from my 18/6. i live in a place that gets mega fucking hot in the peak afternoon sun hours, with bad/possible no insulation, and i use that 6 hours to cool my op off, and gain as much "cool" as possible in that time frame or else i would have heat issues.

[KrisiWeed]

Haha still gonna keep 18-6 n save the leccie

[belialtheunholy]

Originally Posted by mcinnc

Fuck Ed R. is he paying for your energy bill??
18/6 until he does.

Yeah dude, I'd go with 18/6. I'd assume with a 24/hr light schedule, the plants would stretch quite a bit, no?

[ironlung253]

Originally Posted by Rumpleforeskin

What Ed Rosenthal said is you don't save any power using the 18/6 light cycle. You just grow your weed slower. I happen to agree with Ed on this point.


Need the dark


by Ed Rosenthal. Posted on Thursday, October 23 2003 11:00:00 PM

"Do plants need a dark period during the vegetative cycle?"


Does marijuana require a dark period during the vegetative growth stage? I recently read a grow book that advocated an 18-6 light cycle during the early growth stages.


One way in which plants are categorized is by the way they gather and handle carbon dioxide. Cannabis is a C3 plant. It uses the CO2 it gathers during the light period, when it is photosynthesizing. Plants designated C4 also gather CO2 during the dark period for use during the light period. Many C3 plants, including cannabis, do not need a rest period. They continue to photosynthesize as long as they are receiving light.
The plant's photosynthetic rate determines its growth rate because the sugars are used by the plant to build tissue and for energy. Cannabis under continuous light will grow 33% faster than the same plants on an 18-6 light regime.
Readers with grow questions (or answers) should send them to Ed at: Ask Ed, PMB 147, 530 Divisadero St, San Francisco, CA 94117, USA.
You can also email Ed at AskEd@cannabisculture.com and send queries via his website at www.ask-ed.net.
All featured questions will be rewarded with a copy of Ed's book, The Big Book of Buds.

Thank you sir, finally someone everyone will shutup and listen to. (I don't mean that in a rude way.)

People like to argue personal opinions all day long, even after facts have been laid on the table though.