Devilspawn
Well-Known Member
Ever see the giant cabbages. Cauliflower n broccoli they grow there under 24/7 and they look prehistoric
18/6 never again
- Thread starter stumpjumper
- Start date
abandonconflict
Well-Known Member
Now I'm curious about Alaskan Thunderfuck.
resinousflowers
Well-Known Member
i always do 20/4,i think the dark time makes the plants abit happier.i notice my plants starting to droop 30-60 minutes before lights off,they always perk right back up when the lights come back on,unless they need watering.
gladstoned
Well-Known Member
I agree with you completely. That probably still makes you a freak though. lol
MrSlick
Member
This is exactly why I believe they need some darkness.
i go with 24/0 for the first 2 weeks and then switch to 18/6 as I believe that all living things need a rest period (Subcool also believes this). I have done both and IMO 18/6 gives me the darkness at night from 12-6am so the neighbors dont see any light coming out of a pin prick in my window covering.
peilo
Well-Known Member
I agree
18/6 works. atleast for my liking
Like any living organism we need time to grow which we do when we sleep. Humans grow and muscle repairs itself in sleep mode. If you think that your plants are any different you must know something the rest of science doesn't. They grow taller faster in dark, and bushier with tight nodes almost to close to the stem to flower and allow the buds to breath and fully mature under 24 hr light
Plants do grow in the "dark."
There are 2 phases to photosynthesis: a light phase and a dark phase. The dark phase does not necessarily mean it happens in the dark but it CAN occur during the dark. It is the metabolism of the compounds made during the light phase, the phase requiring sunlight, of photosynthesis.
Read more: http://wiki.answers.com/Q/What_happens_when_you_manipulate_plant_growth_by_growing_plants_in_the_dark#ixzz1juh5Catw
There are 2 phases to photosynthesis: a light phase and a dark phase. The dark phase does not necessarily mean it happens in the dark but it CAN occur during the dark. It is the metabolism of the compounds made during the light phase, the phase requiring sunlight, of photosynthesis.
Read more: http://wiki.answers.com/Q/What_happens_when_you_manipulate_plant_growth_by_growing_plants_in_the_dark#ixzz1juh5Catw
stumpjumper
Well-Known Member
http://www.marijuanapassion.com/forum/archive/index.php/t-39970.html
"It's been established for many many many years now that cannabis is a C3 plant. It does not need a dark period.
C3 plants gather CO2 only during the light period when they are photosynthesizing. As long as the light is on, C3 plants gather and use CO2 for photosynthesis.
Some growers practice a version of anthropomorphism with their plants. They believe that since people need rest, plants do as well. Concerning cannabis, this is not true.
Every grower can make a personal choice about light cycle. They can save on their electric bill or prolong ballast/bulb life. 18/6 can be less of a "shock" when changing over to 12/12 for flowering than 24/0 or heat issues can be addressed by fewer hours of light, but basic botany has proven long ago that cannabis needs no dark period.
Ed Rosenthal, Mel Frank and Robert Clarke all have covered this extensively over their careers.
hXXp://www.mellowgold.com/grow/mjbotany-removed/marijuanabotany1.html Marijuana Botany Chapter 1 - Sinsemilla Life Cycle of Cannabis
hXXp://www.cannabisculture.com/articles/3127.html Need the dark
-------------------------------------------------------------
"This is a direct quote from Ed Rosenthal whom most of you know is a marijuana growing guru:
Marijuana plants photosynthesize as long as they receive light as well as water, air, nutrients and suitable temperature. Photosynthesis is the process in which plants use the energy from light (primarily in the blue and red spectrum's) to combine carbon dioxide (CO2) from the air and water (H2O) to make sugar while releasing oxygen to the air.
Plants use sugars continuously to fuel metabolic processes (living) as well as for tissue building. The plant combines nitrogen (N) with the sugar to make amino acids, the building blocks of proteins. They are the substance of plant tissue. When the light is off, the plant's metabolic processes, respiration and growth, continue.
The plant can photosynthesize continuously so it produces the most energy and growth when the light is on, continuously. Continuous light does not stress the plant, which reacts somewhat mechanistically to it.
Plants under an 18-6 light-dark regimen are producing sugar only three quarters of the time. They are thus growing at only 75% of their potential. Leaving the light on continuously will result in bigger plants, faster, which leads to higher yields."
-------------------------------------------------------------
"The following information is straight from Greg Green's "The Cannabis Grow Bible"
Cannabis is a light demanding plant. Professional growers keep the light on their plants using the 24/0 photoperiod for this reason. Plants that grow under 24/0 flourish and do not need a quantity of darkness in order to rest and perform photosynthesis properly. Plants that are grown in optimal conditions under 24/0 light regime grow vigorusly and the benefits of a 24/0 photoperiod can be seen actively in the results. More nodes are formed, more branches are created, leaf numbers increase, the plant is growing at its finest.
Some growers opt to use 18/6 as their photoperiod. This is 18 hours of light, six hours of darkness light regime. Under these conditions the plant will grow quite naturally but not as vigorously as the 24/0 photoperiod.
The 18/6 photoperiod expels 3/4 the amount of light that a 24/0 photoperiod does. Although this does not mean that a plant produces 1/4 less leaves,branches and nodes under the 18/6 photoperiod, it certainly does show the correlation between light and cannabis growth. As we have said already, cannabis is a light demanding plant. There are no problems associated with 24/0 and although some have attributed cannabis sexual dysfunction (the hermaphrodite conditon) to 18/6 photoperiod these problems are actually the result of heat stress.
A 24/0 photoperiod requires that your grow room temperature be kept well monitored. The 18/6 option is cheaper to run. You use a quarter less electricity and this will have an impact on your electricity bill. Also the 18/6 photoperiod will generally extend the bulb's lifespan. During the 6 hours of darkness the grow room is allowed to cool down for this period but a well maintained good grow room setup should not require a cooling down period.
24/0 and 18/6 both share the same problem though. Once you start the photoperiod you should keep that way especially when the plants near maturity (the preflowering stage). An irregular photoperiod can cause more males than females to develop. It can also cause sexual dysfunction to appear. Whether you choose 24/0 or 18/6 as your vegetative photoperiod try to keep that photoperiod unitl your plants are mature enough to express their sex."
"It's been established for many many many years now that cannabis is a C3 plant. It does not need a dark period.
C3 plants gather CO2 only during the light period when they are photosynthesizing. As long as the light is on, C3 plants gather and use CO2 for photosynthesis.
Some growers practice a version of anthropomorphism with their plants. They believe that since people need rest, plants do as well. Concerning cannabis, this is not true.
Every grower can make a personal choice about light cycle. They can save on their electric bill or prolong ballast/bulb life. 18/6 can be less of a "shock" when changing over to 12/12 for flowering than 24/0 or heat issues can be addressed by fewer hours of light, but basic botany has proven long ago that cannabis needs no dark period.
Ed Rosenthal, Mel Frank and Robert Clarke all have covered this extensively over their careers.
hXXp://www.mellowgold.com/grow/mjbotany-removed/marijuanabotany1.html Marijuana Botany Chapter 1 - Sinsemilla Life Cycle of Cannabis
hXXp://www.cannabisculture.com/articles/3127.html Need the dark
-------------------------------------------------------------
"This is a direct quote from Ed Rosenthal whom most of you know is a marijuana growing guru:
Marijuana plants photosynthesize as long as they receive light as well as water, air, nutrients and suitable temperature. Photosynthesis is the process in which plants use the energy from light (primarily in the blue and red spectrum's) to combine carbon dioxide (CO2) from the air and water (H2O) to make sugar while releasing oxygen to the air.
Plants use sugars continuously to fuel metabolic processes (living) as well as for tissue building. The plant combines nitrogen (N) with the sugar to make amino acids, the building blocks of proteins. They are the substance of plant tissue. When the light is off, the plant's metabolic processes, respiration and growth, continue.
The plant can photosynthesize continuously so it produces the most energy and growth when the light is on, continuously. Continuous light does not stress the plant, which reacts somewhat mechanistically to it.
Plants under an 18-6 light-dark regimen are producing sugar only three quarters of the time. They are thus growing at only 75% of their potential. Leaving the light on continuously will result in bigger plants, faster, which leads to higher yields."
-------------------------------------------------------------
"The following information is straight from Greg Green's "The Cannabis Grow Bible"
Cannabis is a light demanding plant. Professional growers keep the light on their plants using the 24/0 photoperiod for this reason. Plants that grow under 24/0 flourish and do not need a quantity of darkness in order to rest and perform photosynthesis properly. Plants that are grown in optimal conditions under 24/0 light regime grow vigorusly and the benefits of a 24/0 photoperiod can be seen actively in the results. More nodes are formed, more branches are created, leaf numbers increase, the plant is growing at its finest.
Some growers opt to use 18/6 as their photoperiod. This is 18 hours of light, six hours of darkness light regime. Under these conditions the plant will grow quite naturally but not as vigorously as the 24/0 photoperiod.
The 18/6 photoperiod expels 3/4 the amount of light that a 24/0 photoperiod does. Although this does not mean that a plant produces 1/4 less leaves,branches and nodes under the 18/6 photoperiod, it certainly does show the correlation between light and cannabis growth. As we have said already, cannabis is a light demanding plant. There are no problems associated with 24/0 and although some have attributed cannabis sexual dysfunction (the hermaphrodite conditon) to 18/6 photoperiod these problems are actually the result of heat stress.
A 24/0 photoperiod requires that your grow room temperature be kept well monitored. The 18/6 option is cheaper to run. You use a quarter less electricity and this will have an impact on your electricity bill. Also the 18/6 photoperiod will generally extend the bulb's lifespan. During the 6 hours of darkness the grow room is allowed to cool down for this period but a well maintained good grow room setup should not require a cooling down period.
24/0 and 18/6 both share the same problem though. Once you start the photoperiod you should keep that way especially when the plants near maturity (the preflowering stage). An irregular photoperiod can cause more males than females to develop. It can also cause sexual dysfunction to appear. Whether you choose 24/0 or 18/6 as your vegetative photoperiod try to keep that photoperiod unitl your plants are mature enough to express their sex."
BigBuddahCheese
New Member
As always do what works best for you. It is all the same argument, flush or not, 24/0 or 18/6, prune or not prune.. blah blah. It is pointless to argue, try both use which one is right for you.
I use 18/6 after coming from 24/0, I found the opposite plants grew faster and bigger with darkness. Uh oh...
I use 18/6 after coming from 24/0, I found the opposite plants grew faster and bigger with darkness. Uh oh...
Bubbies
Active Member
Totally agree with BigBuddahCheese: Do whatever gives you the best results!
gladstoned
Well-Known Member
Me too.
I didn't like the idea of my lumateks running forever too. Them little fuckers get pretty hot. I like the looks of everything when I sneak down really early and watch it all kick on, everything looks happy, cool and rested.
stumpjumper
Well-Known Member
That's just crazy.... What a donkey dick.
southernbud
Member
i here you on the 18/6 it sucks ,i have always veg'd going on 24/7 ,works great ,first time i did the 18/6 i got a huge streach going on way to frecken much ...thats with topping them ,never again will i do the 18/6,..i have shorter node set up on 24/7
Timmahh
Well-Known Member
light type, quality and strength has ALOT to do with stretch and node spacing.
i ll post 2 pics i just took in the last few days. today is the 2nd day of the 3rd week in bloom. all growth is under 400w Philips CMH Bulbs, including Veg. 400w in Veg and 800w in Bloom 18/6 veg 12/12 bloom
check the node spacing on these 2 pics. again 400w CMH in Veg, 2 400w CMH in bloom.
not arguing that 18/6 is better than 24/0, just the time frame is NOT the only key to the big picture.
i ll post 2 pics i just took in the last few days. today is the 2nd day of the 3rd week in bloom. all growth is under 400w Philips CMH Bulbs, including Veg. 400w in Veg and 800w in Bloom 18/6 veg 12/12 bloom
check the node spacing on these 2 pics. again 400w CMH in Veg, 2 400w CMH in bloom.
not arguing that 18/6 is better than 24/0, just the time frame is NOT the only key to the big picture.
st0wandgrow
Well-Known Member
Agreed. I've taken the same plant, same light, same feeding schedule, etc, and exposed one group to 18/6, and the other group to 24/0, and the 18/6 bunch got real stretchy and flimsy.
I'm a fan of 24/0 as well.
wyteberrywidow
Global
I am with you all the way here
