The Grow Awards 2025 🏆 
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
So if I got my auto on a 20/4 light schedule, what...
HiddenMessagestarted grow question 4 years ago
So if I got my auto on a 20/4 light schedule, what would happen if I switched her to 12/12?? Not the plan just curious...
likes
CRiSPrGrowanswered grow question 4 years ago
Hey there HiddenMessage. The main idea is that there is no where on earth with lights on 20/4 and where weed grows, so light can actually cause a lot of stress, something like "light stress", often time when you reduce the light cycle you'll see more growth because the plant does grow more during the night , put simply : plants need rest too. THC and terpenes actually get degraded by light, that's why i reduce the light cycle during flower even for autos. Hope this helps ! 🚀
TheOldHippieanswered grow question 4 years ago
Ok here's an answer that's a bit more in depth based upon my experience.
Bottom line is it comes down to the strain. Some with solid genetics like Mephisto, can take 20/4, and I've even seen growers do them at 24.
I'm growing out a few from a not well known breeder of autos. And their auto actions were weak. They started but they weren't spitting like they should have been. Switched to 12/12, kept the nutes the same, and bam! Spitting flowers.
I think it comes down to the ruderallis part of the strain. If its bred out too thin, it might not have the kick it needs to be an "all in" auto. Genetics does matter.
likes
Complain
Mr_Weeds_Autosanswered grow question 4 years ago
Hey Growmie,
Changing the light cycle would just make the plant start flowering. Hopefully, I answered your question and remember Happy Growing and Free your mind one puff at a time.
1 like
Complain
Similar Grow Questions
Solved
redshift75
what is this called when it sprouts a mono leaf? and is it bad?What is this called when you only get 1 leaf and 1 cotyledon? is this adverse or a negative? never experienced a mono. Is this going to perform sub par and should i pop a new monster to be a mother for this strains grow?Week 2
Plant. Other
5 years ago
2
3
Solved
Penguin
Nute burn or deficiency?Does it look like she is suffering from nute burn in the most recent pictures?Week 3
Plant. Other
5 years ago
2
4
Solved
TripleCcannabis
Stop floweringIm not sure why this pink kush is goong into flower when I have it in an 18/6 light schedule. Is it to late to stop it from flowering?Buds. Other
Plant. Other
5 years ago
1
3
Solved
WeedMannz
Sickness or too many nutrients?the first time that I grow, unfortunately I am starting to have these problems on the leaves, I water every 2 days with 3 liters for 4 plants and I do every 2 liters (bottle) 2 ml "Power roots" 8 ml Alga Grow and 2 ml Green Sensation.Plant. Other
5 years ago
8
8
Solved
krok464
When to start flushing?How do you guys think, how long these plants might need to finish? Reason I'm asking is that I'm planning at least 10 day flush before harvest and because I lack of experience in growing (there were maybe 2 grows I went through) I don't really know when to start. Any ideas? :)Week 8
Plant. Other
5 years ago
4
4
Solved
LAzerBEAN
POLLINATE NOW for mature seeds? Auto Plants in Week 6My Auto plants at week 6 have formed pistils.
I don't feel like they are quite mature enough to pollinate yet.
I am basically at the halfway point of this grow. I don't want to miss the window to have fully mature seeds.
Any pollination methods/advice?Week 6
Plant. Other
5 years ago
5
4
Solved
WeedMannz
In your opinion, can I send in bloom?In your opinion, can I send in bloom?Plant. Other
5 years ago
4
6
Solved
Autoauto
Is plant size small for age? ( did I lose a week from transplant shock?)Should plant be flowering by now!?!
Week two had major issues light cut off and seedlings were started in bad soil ph 7.5 miracle gro organic after trying to bring ph Down and failing I transplanted to stinington blend and living soil growth stopped for a weekWeek 6
Plant. Other
5 years ago
1
1
Solved
vicisdope
Hydrogen peroxide spray on buds for musty smellI am a few weeks into flowering - have intake and extraction fans and a dehumidifier. Soilless soil
RH 45% top of canopy
I noticed a musty smell - I sprayed hydrogen peroxide 3% 50/50 water.
Buds are growing / looks healthy (yellow tint on leaves).
Is this effective for thisPlant. Other
Roots. Smelly
5 years ago
1
1
Solved
Gemini_Grow
Are my plants ready for flowering?It is my first time with photoperiod and my box is really small (60x60x160cm)
I'd like to take more space as possible so I was asking should I wait or can I go with 12/12?
I was also thinking to remove bottom growth to avoid popcorn buds, is it good? How much internodes at least?Plant. Other
5 years ago
2
3
