72 hours of darkness at harvest

You could always E-mail James Burton maybe he could shed some tight on the subject. I kinda got the feeling he was tired of answering this question, but you never know.

Jack Larson said:

... I know you have tried it on like ten strains with no decernable change. I have tried it on eight strains with only one showing an increase of gland size IMO. I just got a new digital camera so in about six weeks. I'll post some side by sides pics. Like I said, people should experiment. It is my opinion that it does work on some strains and figuring out what strains and legth of dark period produce the best results is fun and it doesn't cost anything, so why not try it? PLEASE post any Scientific findings you come across.......J.L.

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Yeah, I'm not saying people shouldn't try it themselves but after seeing this SIMM tidbit posted all around the web on different forums, I just found it odd that no one had a copy of the actual 'study' (or even minor details about the 'study' like the number of strains tested or which strains or which hybrids it tends to 'work' on; sativa or indica). Makes me think this 'technique' is just another rumor that's passed down from one generation of new growers to the next. It doesn't help that certain 'respected' members like Bricktop on various forums keep posting this with nothing to back it up.

You're correct, I have tried it on about a dozen strains and could try it on the 8 that I have now. But over the years, I've found that dialing in the basics yields a far bigger difference than these cutesy techniques whose results are suspect at best. Cheers and +rep for being critical of skeptical information.

ive heard that right before you harvest, keep your plants in the dark for 36 hrs and add ice cubes to your res.this shouls increase resin production i myself have not tried this. hey hb maybe you can do the test for us at the end of this run, i mean if ya want to? oh yeah i also heard that 36 hrs dark before 12/12.ok one more guys/gals i also heard to harvest your garden @ 12:00am on outside crops..Damn i hear alot of things..

maphisto said:

ive heard that right before you harvest, keep your plants in the dark for 36 hrs and add ice cubes to your res.this shouls increase resin production i myself have not tried this. hey hb maybe you can do the test for us at the end of this run, i mean if ya want to? oh yeah i also heard that 36 hrs dark before 12/12.ok one more guys/gals i also heard to harvest your garden @ 12:00am on outside crops..Damn i hear alot of things..

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Unfortunatly myths out number facts by about 10 to 1 when it comes to marijuana culivation nobody wants to say I have no fucking clue, so they just make shit up . I really feel for the noob that listens to bad info. It is my opinion that one should master the basics, then experiment.....and Good Luck...J.L.

It is good to harvest before the lights come on, or ''at 12:00 am," when more of the salts/nutrients are located in the mediuma and around the root zone. I hope one day we will see some real scientific tests done on this subject, but until then neither arguement of for, or against the increased thc content can be seen as correct.

Do you have any thoughts on how long a plant should be in the dark before harvest? I always cut about a 1\2 hour before my lights come on, for me thats 7:30 a.m.to 7:30p.m. so I guess my ? is, could I harvest at say midnight or is it better to waite till morning? ( I stay up late and 7:30 comes a little too early for me..) how long do you think it takes for the salts, nutes, etc. to drain "if you will "out of the plant and into the medium ? I always figured the longer the better, but it wouldn't be the first time I was wrong.Thanks...J.L.

I am growing endless sky. I emailed doc greenthumb and he said he thought it was just a myth.

Jack Larson said:

Do you have any thoughts on how long a plant should be in the dark before harvest? I always cut about a 1\2 hour before my lights come on, for me thats 7:30 a.m.to 7:30p.m. so I guess my ? is, could I harvest at say midnight or is it better to waite till morning? ( I stay up late and 7:30 comes a little too early for me..) how long do you think it takes for the salts, nutes, etc. to drain "if you will "out of the plant and into the medium ? I always figured the longer the better, but it wouldn't be the first time I was wrong.Thanks...J.L.

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I don't have any research saved on this but i do it 2-3 hours before lights come on. In my head I'm thinking that maybe the plants start suckig everything up a little before the lights come on so they are ready to go right away. They must know the lights are about to come i dunno though good question. You could probably find out by testing the Ph and ppm's/EC every 30 minutes to an hour or so during the end of the night cycle.

Alex Kelly said:

I don't have any research saved on this but i do it 2-3 hours before lights come on. In my head I'm thinking that maybe the plants start suckig everything up a little before the lights come on so they are ready to go right away. They must know the lights are about to come i dunno though good question. You could probably find out by testing the Ph and ppm's/EC every 30 minutes to an hour or so during the end of the night cycle.

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Thanks I hadn't thought about that, but it makes sense + rep. ...J.L.