Change Flowering Hours????!?!??

ace720

ace720

Active Member
Got a question - right now my 12/12 schedule for lights on is 6am to 6pm, due to some temp concerns, I was thinking of changing my lights to being on from 6pm to 6am.

Can someone please tell what, if any, damage this would do to my plants?

IMG_0287.jpg Growing in a 2x2 tent with a 250 hps
 
axionjaxson

axionjaxson

Well-Known Member
just dont turn them on in the morning tomorrow , wait til tomorrow evening at 6pm and turn them on , just forget you did it cause your plants won't even trip , just don't turn them on at 6 am , leave them on all day , and then leave them on all night , just skip ur 6 am turn on tomorrow and do it at 6pm , all will be good, don't worry bout them .
 
Theunion

Theunion

Well-Known Member
There shouldn't be to much of a problem, the new light schedule will only stress the plants mildly, As long as they are still getting a 12/12 schedule they should be fine
 
Californicater

Californicater

Active Member
axionjaxson said:
just dont turn them on in the morning tomorrow , wait til tomorrow evening at 6pm and turn them on , just forget you did it cause your plants won't even trip , just don't turn them on at 6 am , leave them on all day , and then leave them on all night , just skip ur 6 am turn on tomorrow and do it at 6pm , all will be good, don't worry bout them .
Click to expand...
Yup, give them a double dose of dark then get back on your 12/12.
 
Senseimilla

Senseimilla

Well-Known Member
Actually pretty sure all you need to do is give them an extra 12 hours of light. Flowering is controlled by the hours spent in dark -- there is actually a technique of 12 hours dark and 20+ hours of light. Higher yields but longer grow times. It's ok to go longer on your light cycle, just not less on your darks.
 
k0ijn

k0ijn

Scientia Cannabis
Best is to leave the light on from ~6AM to ~6AM next day.
Plants tend to get stressed when the darkness period is too long or too short (broken up).
It's better to just have a temporary (1 day in your case) period with the light on and then get back into the 12h darkness, that way you will not have 'broken' the amount of darkness given at any given time, you will just have extended the light period temporarily.

To sum up, leave the lights on (24h in your case) until you reach the point where you want the darkness period to begin.
 
P

phishtank

Well-Known Member
i would imagine giving it too much light would cause stress...because then the light period is increased it may cause it to revert back to veg and stop growth for a few days untill it figured out what the fuck happened.
 
k0ijn

k0ijn

Scientia Cannabis
A plant will not re-veg by giving it 24h of light to change a light schedule.
Yes it might get slightly stressed, which is unavoidable when you change light schedule while growing but it won't have any lasting effect.

The plant will only re-veg if you change the darkness period as well and only if you do it for a sustained period of time (1-2 weeks usually).
These plants can take more than you'd think, they are not as fragile as many people make them out to be.
 
P

phishtank

Well-Known Member
Yes but you always hear about people giving prolonged periods of dark to try and kick start the flowering process. Just saying I'd personally do 24 hours of dark to fix your light schedule before i'd do 24 hours of light.
 
k0ijn

k0ijn

Scientia Cannabis
Well yeah but there is much debate on that topic, which isn't really that relevant to this thread since there are many arguments for and against.
Most importantly imo, there is no scientific proof that prolonged periods of darkness (whatever that literally means) kick starts the flowering process.

I'm not trying to start an argument or anything but the evidence is just not there.
If you want to believe in it, go ahead, as long as it's not presented to others (especially new growers) as fact :weed:


It's like the flushing 'discussion' or the roots in boiling water after chop to push out trichomes.
The same evidence issues exist.
 
Senseimilla

Senseimilla

Well-Known Member
You can do it either way. The main difference will be one way you get 12 extra hours (an extra day almost) of light. There are people who grow on a 12/22 schedule. Going 24 hours of light for one day will NOT do anything negative to your plant. Going 24 hours dark will not do anything severely bad to it but you will definitely be able to tell the difference visually compared to normal when you bring lights back up. And FYI, people give plants extra dark to convince the plants they are DIEING and force them to put out extra resin in an attempt to mate before death. Convincing your plant it is dieing = stress. Not saying 24 hours is going to make a big difference, just saying that's the principle of extra dark time at the end of flower.
 
Senseimilla

Senseimilla

Well-Known Member
Nope it's one day not likely to make a substantial difference no matter which way you go as long as you get back on a regular schedule after.
 
+ WitchDoctor +

+ WitchDoctor +

Well-Known Member
I've done this twice before and can share my results. The first time I did it because I accidentally fucked up my timer and the light had already been on 20 hours, so I just went the extra 4 and then kept them set that way until those plants finished. They took about 10 days longer than I expected to finish. The second time I did it, I weened it over a 6 day period by giving it 14 hours of darkness and 10 hours of light for 6 days. My idea was that if anything giving it two extra hours of light would just make them finish early if anything, rather than late. My plants finished on time however, not early or late. I would recommend this route, although I can't offer you any proof that it is a better idea. It worked for me though.
 
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