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  • Dark period before harvest?

    Is it a good idea to leave the plants in the dark for a few days before harvest? How many days are we talking like 3?

  • #2
    From what I have read, that is a bit of a myth. However I was told to always harvest plants after the sun sets, or while they are in their dark period.. Something about starches.. not exactly sure, but I have always done this.

    GFam
    Swimming into the great genetic pool of Cannabis

    'A Guerilla Army attacks where they aren't expected, secures victory, and then, vanishes without a trace'

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    • #3
      Originally posted by Guerilla Family
      From what I have read, that is a bit of a myth. However I was told to always harvest plants after the sun sets, or while they are in their dark period.. Something about starches.. not exactly sure, but I have always done this.

      GFam

      So what would be the difference in the buds between lights on or lights off harvests?

      I usually run my lights at night, and end up harvesting in the morning after little ones head off to school. So I'm typically harvesting near the end of the light on cycle, or opposite of what your saying GFam.

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      • #4
        I would like to hear what Useless or Skunky have to say about this. I too was planning on blacking out my plants for 2-3 days, just to see what happens..... not that I'd be able to tell though unless I just black out a few of them.
        Grown: Critical Mass, Strawberry Cough, Violator Kush, Kushberry, Somango, Molokai Frost, Kandy Kush, Bubblelicious, Hericules, Jackberry, K.O kush, Uber kush, Heribei, Herijuana, The OG #18, Bubba 76

        Growing: Smackberry, Chemdawg x Cocoa Kush, Redneck Kush

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        • #5
          Originally posted by Average Joe
          So what would be the difference in the buds between lights on or lights off harvests?

          I usually run my lights at night, and end up harvesting in the morning after little ones head off to school. So I'm typically harvesting near the end of the light on cycle, or opposite of what your saying GFam.
          What im saying is that I was always told not to harvest in the middle of the light cycle. Like, If they were outdoors, dont harvest during the hottest part of the day, say A bit after noon. I was always told to harvest in the evening, or early morning.. Thats all I am saying. I think that coincides with what you said AJ..IF im wrong, I may be misunderstanding you.

          GFam
          Swimming into the great genetic pool of Cannabis

          'A Guerilla Army attacks where they aren't expected, secures victory, and then, vanishes without a trace'

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          • #6
            cjb03 posted a thread about "flushing" on 3-17 and in that thread this is what shaitand had to say...
            "Some people say its not needed but I also use a couple days dark period before harvest. If you leeched then all the nutrients should have been converted to sugars in the plant and no more photosynthesis should be needed. Light at that point is just destroying photo sensitive flowering hormone and THC (which is just as light and temp sensitive on the plant as after harvest).

            My understanding is that photosynthesis is needed to convert light to sugars but that the plant will continue using the sugars it already has without the need for light so long as it has water. If that is the case, leaving the plant intact in the dark will allow it fully use all its sugars and since flowering hormones are light sensitive their high levels should mean those sugars will be used for flowering and not veg. Should give sticker/heavier buds (somewhat, its only a couple days) and smoother smoke."

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            • #7
              Originally posted by bLITzkRIEg420
              cjb03 posted a thread about "flushing" and in that thread this is what shaitand had to say...
              "Some people say its not needed but I also use a couple days dark period before harvest. If you leeched then all the nutrients should have been converted to sugars in the plant and no more photosynthesis should be needed. Light at that point is just destroying photo sensitive flowering hormone and THC (which is just as light and temp sensitive on the plant as after harvest).

              My understanding is that photosynthesis is needed to convert light to sugars but that the plant will continue using the sugars it already has without the need for light so long as it has water. If that is the case, leaving the plant intact in the dark will allow it fully use all its sugars and since flowering hormones are light sensitive their high levels should mean those sugars will be used for flowering and not veg. Should give sticker/heavier buds (somewhat, its only a couple days) and smoother smoke."
              Im not saying that leaving the plant in a dark period for a couple of days before harvest isnt beneficial, I only stated what I have heard. I am not certain it is right or wrong, just posting something I had heard. Hopefully, one of the professors will stop by to comment on this one..

              Skunky? Useless? Anyone?

              GFam
              Swimming into the great genetic pool of Cannabis

              'A Guerilla Army attacks where they aren't expected, secures victory, and then, vanishes without a trace'

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              • #8
                GFam I'm with you as I think this might be a bit of myth... Harvesting at the END of the dark period does give you 12 hours of dark before harvest. I also thought they will continue to use these sugars without photosynthesis after being harvested so is this the same as a dark period while they are still in pots? Now I feel confused, frightened and far from home... Or that could be the

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                • #9
                  Myth.

                  The only thing I have ever heard and makes sense was mentioned by Shiatand.

                  Light degrades THC. Therefore harvesting during the dark cycle should in theory provide a slightly higher level of THC. However, from experience, there is no noticable difference in potency when the final product is smoked.

                  Use of the stored sugars relates more to terpene and terpenoid profiles, and smoothness of the smoke.
                  "I desire knowledge by nature," the words of Aristotle, my nature is not to hate you. So I try to put myself in the depths of the other man, peace to my brother man, in search of my place in this world to discover man, damn check out the colors man.

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                  • #10
                    Thanks everyone!

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                    • #11
                      Originally posted by Useless
                      Myth.

                      The only thing I have ever heard and makes sense was mentioned by Shiatand.

                      Light degrades THC. Therefore harvesting during the dark cycle should in theory provide a slightly higher level of THC. However, from experience, there is no noticable difference in potency when the final product is smoked.

                      Use of the stored sugars relates more to terpene and terpenoid profiles, and smoothness of the smoke.
                      Thanks Useless, "now we know"

                      GFam
                      Swimming into the great genetic pool of Cannabis

                      'A Guerilla Army attacks where they aren't expected, secures victory, and then, vanishes without a trace'

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                      • #12
                        Originally posted by Guerilla Family
                        Thanks Useless, "now we know"

                        GFam
                        LMAO.

                        Didnt know I was a G.I. Joe commercial...hahahaha

                        is there a smiley of the gi joe with a kung-fu grip?
                        "I desire knowledge by nature," the words of Aristotle, my nature is not to hate you. So I try to put myself in the depths of the other man, peace to my brother man, in search of my place in this world to discover man, damn check out the colors man.

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                        • #13
                          i HEARD....

                          That the reason why people harvest after the dark period is because there are less nutrients flowing in the plant because the light has not turned on, hence a better and cleaner final product...no truth to this?
                          Marijuana=love
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                          • #14
                            The nutrients are already stored.
                            The light just causes photosynthesis. This uses the stored nutrients. 12 hours of light makes little difference. 14 days of photosynthesis, with no food added ensures this process. This is why I always, always flush (read as feed as normal with lain water) for a minimum of 14 days. Organic folks might want to use 21 days of plain water so the middle men (benie bact's) have a little extra time to do their job.

                            The KEY to clean burning, smooth smoke is that the plant metabolize the stored minerals into sugars.

                            So IMO -
                            No, that's not correct...
                            "I desire knowledge by nature," the words of Aristotle, my nature is not to hate you. So I try to put myself in the depths of the other man, peace to my brother man, in search of my place in this world to discover man, damn check out the colors man.

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                            • #15
                              Originally posted by Useless
                              Myth.

                              The only thing I have ever heard and makes sense was mentioned by Shiatand.

                              Light degrades THC. Therefore harvesting during the dark cycle should in theory provide a slightly higher level of THC. However, from experience, there is no noticable difference in potency when the final product is smoked.

                              Use of the stored sugars relates more to terpene and terpenoid profiles, and smoothness of the smoke.
                              You really want to harvest during the dark though because the free mobile nutes are in the root zone and not up in the buds when you chop it like they would be if you chopped it during the light. Makes for a "smoother" smoke, just cures better(easier).

                              Gfam the starch reduction is all that occurs if you give a dark period before harvest. Ex. 3-day dark period before chop is going to deplete starch and other products the plant makes without replenishing them because there isn't any photosynthesis actually going on, only light independent reactions occur.

                              ****I would like to add, don't think this will make your bud better because it won't! It just helps speed up the curing process and helps smooth out the bud if you didn't get a good flush at the end. It will not make your bud more potent or anything like that like some will claim. *****
                              Last edited by skunky; 04-02-2009, 04:12 PM.
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