18/6 never again
- Thread starter stumpjumper
- Start date
tomcatjones
Active Member
in my opinion. your indoor lights ought to dialed back as if seasonal changes occurred.. as well as tilts taken into account.. so your alaskan thunderfuck should be in a light schedule mostly mimicking Alaskan schedules.
always harvest on the full moons. indoors or out.
nights that lengthen over time until they flower.
always harvest on the full moons. indoors or out.
nights that lengthen over time until they flower.
gladstoned
Well-Known Member
I timer is a lot cheaper than electricity. lol. If 24/0 works as good, then I would def. go with 18/6.
st0wandgrow
Well-Known Member
I've done what you're about to do. Cuttings taken from the same plant, same nute schedule, same medium, etc. The only variable was one group was under 24/0 for veg, and the other 18/6. The plants that were grown under 24/0 were simply more vigorous. More leaves, tighter node spacing, less stretch.
I would imagine that different strains, even different phenotypes, may react differently. Just like some strains respond better to lighter feedings, heavier feedings, lower temps, higher temps, etc.
I don't believe for a second that this topic is as black and white as some people suggest.
pharmacoping
Active Member
my work is done in my grow lab. the explants are shipped from grand rapids to detroit to Sandusky. I'm self employed in the tissue culture biz. sales are seasonal mostly, but large volumes of product are needed at once so I keep busy. i also produce mj tc for some select groups. The nurseries are commercially operated.
"you will always find opinions.
what you wont find is a place on earth that has all sunlight all the time."
that is correct, and the gist of it too!
the reason I keep my rooms at 1500ppm with a c02 generator is because there was no way I could use outdoor air to constantly replenish the 400ppm in the room as fast as it is depleted, without contending with all the other issues outdoor temps/air/humidity bring. This was one reason for me to choose a sealed room. outdoors the air around every leaf is refreshed constantly. and will consume this 400ppm in minutes . longer light cycles giving up more growthis not disputed, just not a valid practice for commercialized, for profit, marijuana cultivation.
"you will always find opinions.
what you wont find is a place on earth that has all sunlight all the time."
the reason I keep my rooms at 1500ppm with a c02 generator is because there was no way I could use outdoor air to constantly replenish the 400ppm in the room as fast as it is depleted, without contending with all the other issues outdoor temps/air/humidity bring. This was one reason for me to choose a sealed room. outdoors the air around every leaf is refreshed constantly. and will consume this 400ppm in minutes . longer light cycles giving up more growthis not disputed, just not a valid practice for commercialized, for profit, marijuana cultivation.
gladstoned
Well-Known Member
Honestly I am much more interested in 12/1.
pharmacoping
Active Member
these are all great experiments in growing, and will result in various outcomes. However, if a professional grower, who does this for a living, say a 1/2 pound weekly harvests, can show me any end benefit to these altered lighting schedules, I will take a look, but I've been down the road, with hundreds of harvests, plants, and strains. on my 900th plant right now. Pest breeding cycles, temps, humidity, hormones, etc are all at play . stick with something that works first, and master that, before you try something else only to fail and say it sucks
stumpjumper
Well-Known Member
I'm not convinced... 18/6 wont happen again here.. fuck them stretchy plants..
RawBudzski
Well-Known Member
do Evaporation Coolers work in tandum with dehumidifiers? in a area smaller than 100 sq ft? sealed
pharmacoping
Active Member
stretchy plants...ahhhh? so you have issues within your grow area, completely unrelated to the 24 or 18 hr lite schedule. Please get familiar with the agricultural standards Leibligs Law.......stretchy plants=18/6 lite schedule????wtf?
stumpjumper
Well-Known Member
I have no issues at all, you think you're the only one here with any experience or something? Sorry, if you guys don't see a difference in plant growth between 18/6 and 24/0 then I'd have to say you are the inexperienced. But whatever.. I don't have the time to debate about it.. Try it sometime and come to your own conclusions.
tomcatjones
Active Member
http://www.maximumyield.com/article_sh_db.php?articleID=283
good read.
also... i think i'll be moving from 18/6 anyways.. lol
20/4 will start tomorrow
good read.
also... i think i'll be moving from 18/6 anyways.. lol
20/4 will start tomorrow
ismokealotofpot
New Member
I never do 18/6 its 24/7 till flower then its 11/13 till done.
pharmacoping
Active Member
tomcat.
It is a very interesting article (albeit, adamately denied by the publisher as being relevant to marijuana production). and it seems to support the largely held notion of a dark period, as seen in this excerpt
" Changes in water properties, nutrient availability, temperature, light duration and strength, humidity, and dissolved gas concentrations are big obstacles that need to be orchestrated to achieve maximal metabolic activity."
18/6 will never cause elongation, or stretching, however high temps, weak lighting, humidiy swings,hormones, additives,nutrients,fans, etc. can. I suggest that if you see 24hrs of light as a fix to your stretching problem, and are willing to spend money on the extra juice to fix it, perhaps your plants are not normally growing in the first place. I get 2-3 inches of growth a day in the veg room with 18/6 and proper controls.
Every person I know that tries these silly non standard lite schedules A) always had issue with standard lighting schedules(really not the lite at all)and plant growth, and B) will defend their decision to spend more money on their chosen schedule. These issues are no longer debated by the companies that specifically formulate and instruct for marijuana production like
http://bigbudsmag.com/grow/how/article/start-your-own-medical-marijuana-perpetual-harvest-cycle-february-2012 and this too
http://bigbudsmag.com/grow/article/ideal-indoor-hydroponics-conditions-growing-medical-marijuana-may-2011
which is a good primer to correc your slow growth issues in the grow room. Get your numbers like the article says, and then tell me how much benefit is had by keeping lights on longer than 18 hrs in the veg room. thats all I'm saying. your long lite is simply trying to make up for other shortcomings in the garden, and is evident by your admission of stretchy plants using normal 18hr cycles
It is a very interesting article (albeit, adamately denied by the publisher as being relevant to marijuana production). and it seems to support the largely held notion of a dark period, as seen in this excerpt
" Changes in water properties, nutrient availability, temperature, light duration and strength, humidity, and dissolved gas concentrations are big obstacles that need to be orchestrated to achieve maximal metabolic activity."
18/6 will never cause elongation, or stretching, however high temps, weak lighting, humidiy swings,hormones, additives,nutrients,fans, etc. can. I suggest that if you see 24hrs of light as a fix to your stretching problem, and are willing to spend money on the extra juice to fix it, perhaps your plants are not normally growing in the first place. I get 2-3 inches of growth a day in the veg room with 18/6 and proper controls.
Every person I know that tries these silly non standard lite schedules A) always had issue with standard lighting schedules(really not the lite at all)and plant growth, and B) will defend their decision to spend more money on their chosen schedule. These issues are no longer debated by the companies that specifically formulate and instruct for marijuana production like
http://bigbudsmag.com/grow/how/article/start-your-own-medical-marijuana-perpetual-harvest-cycle-february-2012 and this too
http://bigbudsmag.com/grow/article/ideal-indoor-hydroponics-conditions-growing-medical-marijuana-may-2011
which is a good primer to correc your slow growth issues in the grow room. Get your numbers like the article says, and then tell me how much benefit is had by keeping lights on longer than 18 hrs in the veg room. thats all I'm saying. your long lite is simply trying to make up for other shortcomings in the garden, and is evident by your admission of stretchy plants using normal 18hr cycles
CharlieBud
Active Member
The "dark cycle" does not only occur at night, it simply does not require light. The "dark reactions" are more accurately known as "light-independent reactions". This is a commonly misunderstood aspect of botany.
gladstoned
Well-Known Member
I believe, like already mentioned, that other environmental factors also contribute to stretch and piss-poor growth in general, like heat and humidity.
So you just said that 24/7 is too much lights on time. That the plants will adapt to it and still have their "dark reaction" in the light. Are they useing the light in that period? No so its a waste in my opinion.
Edit) also what you are saying it that this "dark reaction" is so critical to plants that they will perform it in the light. That is very telling it says that they cannot survive without it. It's just like nutes too much is not allways better. Spoil a child their whole life and see how they do when they need to survive on their own.
CharlieBud
Active Member
Light-independent reactions occur 24 hours a day as they do not require light. They happen regardless. This is the most common reason people find to argue for plants needing "sleep", its just fallacious. What I'm not saying though is that the sleep crowd are necessarily wrong, just that they are in no way right due to the "dark cycle" theory.