20/4 vegetative light cycle

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Smitty2323

Member
Dude it took me forever to even figure out how to post on a forum lol. But I have lived enough life and grew more pot than u could ever imagine. Jve just been an outdoor grower until a couple years ago. And its been a major learning curve. All I've done is read about light cycles. Most seem to favor 18/6. I was trying to gain something somewhere so I went to 20/4. I've read some that love 24 hr. I 100% disagree with that. If u disagree that's fine but that don't make me wrong and people should make their own decisions before they try a 24 hour.
 
rkymtnman

rkymtnman

Well-Known Member
Smitty2323 said:
Dude it took me forever to even figure out how to post on a forum lol. But I have lived enough life and grew more pot than u could ever imagine. Jve just been an outdoor grower until a couple years ago. And its been a major learning curve. All I've done is read about light cycles. Most seem to favor 18/6. I was trying to gain something somewhere so I went to 20/4. I've read some that love 24 hr. I 100% disagree with that. If u disagree that's fine but that don't make me wrong and people should make their own decisions before they try a 24 hour.
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it's when people say plants need to sleep that immediately turns on the flashing BRO SCIENCE bulb.
 
Guitar Man

Guitar Man

Well-Known Member
Interesting thread. Keep in mind, the person who started this thread was growing a non-auto-flowering plant and the 24/7 light question was based upon the "Veg" stage. Auto-flowering plants can stay under a 24/7 light schedule and be fine. So can a non-auto-flowering plant, only, in the "Veg" cycle.

Depending on the strain and grow space, vegging a non-auto-flowering plant is critical. The size of the vegged plant must be taken into account via the strain as the stretch can lead to problems depending on how the grower wants to train the plant(s).

The strain I'm growing right now indoor is a monster stretcher. My outdoor grow this last summer with this strain, the plant was a 12 footer. I knew from this grow that I would need to switch the lights to 12/12 when the plant reached 12", otherwise I would be fighting this plant until the end because of limited space. And even at 12" I still topped the plant. Right now, it's at 4 feet, which is perfect for my setup, and I'll be harvesting over the Christmas holiday.

My real point in all of this is, if my vegged plant size is only going to be 12" when I switch to 12/12, does 24/7 really make a difference? Personally, I don't think so.
 
Tangerine_

Tangerine_

Well-Known Member
rkymtnman said:
yep, like my room temps plummet into the 60s so i'd have to run a heater. or i could just keep my lights on instead.

and node spacing under 24/0 is much closer.
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Thats literally the only reason I keep my veg room on a 24/0 schedule but when I'm rooting cuttings or germing seeds in the tent I do 20/4. I've tried it various ways but this produces the fastest root system. If you're ever struggling trying to get cuts to throw roots, give them some darkness.

If heat wasnt an issue I'd run the veg room on the same schedule.
 
Guitar Man

Guitar Man

Well-Known Member
bam0813 said:
Ask those world record vegetable growers in AK when their plants sleep
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I lived there for 4 years. So strange not seeing the stars during the summer, catching salmon down at the river at midnight. Not only are the vegetable records made there, everything is big, including the animals and fish.
 
bam0813

bam0813

Well-Known Member
Agriculture in Alaska faces many challenges, largely due to the climate, the short growing season, and generally poor soils. However, the exceptionally long days of summer enable some vegetables to attain world record sizes.
 
Guitar Man

Guitar Man

Well-Known Member
bam0813 said:
Agriculture in Alaska faces many challenges, largely due to the climate, the short growing season, and generally poor soils. However, the exceptionally long days of summer enable some vegetables to attain world record sizes.
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I live in Washington State, where the long summer days are different than where I grew up in California. All of my grower friends down there wonder how my MJ plants thrive and do so well up here. I tell them, It's all about the light. Because of our longer days, the veg stage is greater, which makes for a much better harvest in the end.

I don't know any MJ growers in Alaska, but the outdoor grows could become a problem because it can snow in September. The window of opportunity is short, and we all know that a MJ plant plant won't stand up to freezing temps below about 27 degrees. I've learned that here, where I take my plants until the cold is here to stay and the angle of the sun is too low.
 
Cotyledon420

Cotyledon420

Well-Known Member
Everybody here is wrong...plants don't need rest cannabis is one of the few plants that don't need to "rest" what matters is the amount of light they get during the day....it's called DLI....if they get too much light it becomes wasted energy at that point....you can run you lights all day as long as you keep the PAR lower...if your goin to run them at 18-6. You can run it at a higher PAR
 
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