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Do they grow towards the light?

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    #16
    https://open.spotify.com/track/6u13t...TFyeARUBXPCH3A



    I can tell that we are gonna be friend's! Id like to thanks to you all for information being gleaned here
    I eat legos

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      #17
      f-e, your observations are good and you are on the right lines....
      Far red - it is the ratio of far red light on the canopy to the lower leaves that influences stretch... so yes it is related to the growth tip 'taking the lead' and growing taller (called apical dominance)
      The mechanism of apical dominance isn't controlled by far red... it is controlled by auxin (a plant growth regulator) - the highest tip produces auxin which stops the sideshoots from developing... bend it down or cut it off and no auxin - and the sidebranches start to grow.
      this thread has a paper about the far red ratio influencing stretch
      https://www.icmag.com/ic/showthread.php?t=194053


      whether it is heat or light that makes sunflowers move to face the sun... who knows.. but to a plant without eyes it is all just different wavelengths on the electronagnetic spectrum anyway !



      VG
      My contributions to this website in no way imply support for any political or cultural views promoted here.
      -----
      To the large and singular furniture of this noble island i have added from foreign places all the variety of herbs and flowers that i might any way obtain. I've laboured with the soil to make it fit for plants, and with the plants that they might delight in the soil - so they might live and prosper under our climate as in their native and proper country.
      Gerard's Herbal (1636)

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        #18
        Its not even different wavelengths on the electromagnetic spectrum to them, they react to quanta of different momentum values. The badly misnamed photosynthesis works just the same if you bombard the leaf with electrons which carry the same energy that photons of the correct wavelength do.

        Originally posted by Red October View Post
        You might need to use a meter to measure the lumen output at the growth tips. Seems sativas prefer a certain range and anything above is a negative.

        With led lights it seems that because of the lower heat production they get placed closer to the plants but the plants can also handle only a certain amount of lumens per a square inch in reality.

        I don't have any experience with led lighting but I have done quite a bit of reading lately and this seems to be a common issue with strong led lights along with higher N issues as the plants don't seem to take it up as readily.
        I think growing under LEDs is a little weird because the ratio of growth band energy is so high. Under any broadband source of light all of that waste light thats not in the preferred wavelengths is still there to cause evaporation, but not under LEDs. LEDs work great for growing plants, but you can feel that the light is weak & thats not only because LEDs run cool, its also because the photon pressure is low under them compared to broadband light sources. LEDs produce less photons overall than other lamps do. I thought this up when I was noticing that wet soil takes forever to dry out under LEDs if there isn't a plant in the soil to suck all the moisture out. I brought some big containers of dirt inside that had been sitting out in the rain for a month and I started some seeds in them under LEDs & it was weeks before I had to water the first time, I don't think it would've been that long under 18 hours of continuous sunlight. Sunlight is incredibly wasteful, most of those photons are outside the pot plant growth bands.

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          #19
          For well over ten years I have run a vertical garden. I have never follow any kind of belief that cannabis grows towards the light. The leaves on my plants orientate to the brightest light but all the branches do their thing and grow in all directions including, but not only, towards the light.
          Bare bulb, HPS and LED with little or no overhead lighting or no screen, all it takes is an occasional stake to keep a random shoot out of the lights.

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            #20
            Most people don't have the patience, but take the plant that has leaves turn towards the light and turn it around. Now just watch. It takes about 20-30 min for the leaves to turn back towards the light. Little twitches and shakes happen and suddenly the leaves are back pointed towards the light.

            Also with plants that are slightly wilted before watering. Water them and watch as the perk back up, twitching and doing plant things. It is cool to watch at least once.

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              #21
              Originally posted by hayday View Post
              For well over ten years I have run a vertical garden. I have never follow any kind of belief that cannabis grows towards the light. The leaves on my plants orientate to the brightest light but all the branches do their thing and grow in all directions including, but not only, towards the light.
              Bare bulb, HPS and LED with little or no overhead lighting or no screen, all it takes is an occasional stake to keep a random shoot out of the lights.
              Have you ever noticed them orientated towards the HID when the LED was the brighter light ? I'm wondering if they judge where the most energy comes from, based on total effect or effects of a specific type, such as might be caused by 660nm (maybe your leds have 660 but not 730 and beyond)


              My veg is just citizen cobs and I have moved the light away, so it's no longer above them but instead at 45 degree's away. It's still the only source in the area though. Results will take a little while to come in. Then I may add a heat source the other side. To play them off against each other.


              As a general observation, the other type of money plant on my window sill likes to lean towards the light. It's just a stick. Recently it busted out side growth which shows no interest. If it did grow towards the light in it's entirety, it will fall in the direction of the equator. Evolution would of made it a creeper long ago. Oh.. wait.. it is a creeper. It puts out roots from it's stem all the time. That's a wormhole I don't want to think about. Back to Cannabis plants.

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                #22
                When I was a teenager, I tried to grow a few plants in my bedroom with fluro tubes.
                I had a makeshift light that came from a movie poster display.
                I had the light directly above the plant. One day I got the bright idea to see what happens if I put my black light on it.
                Within 30 minutes the plants turned away from the fluro above and all three completely oriented towards the black light. All three bent in half at a 90 degree angle to point it's top at the blacklight. It was surprising because the fluro tube "looked" much brighter than the blacklight and was closer to the tops.
                Even though the blacklight was further away and on the side, instead of directly above
                "I have only read fragments of your posts. But I have read enough to know that you can grow some mean herb."
                --- CVH
                _____________________________
                "we growing.
                till the fucking zombies show."
                --- Useless.Gardens

                My current thread

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                  #23
                  I ran two donuts for a shot amount of time, one hps and the other led. The led side looked at their light and the hps did the same. There were some plants that were in close proximity to both lights but they each faced the bright light they were hanging out around.

                  Now I have to admit, I was not looking for any kind of data here so I might not have noticed any minor difference between the two lights and the back of the middle plants. Sorry not more conclusive here lol

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                    #24
                    Antigravity + light = where they grow. Someday we will harness the plants antigravity technology. We already grew eyeballs to detect light.
                    For the last time, I'm pretty sure what's killing the crops is this Brawndo stuff.

                    "But Brawndo's got what plants crave."

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                      #25
                      So, unsurprisingly, my plants didn't grow towards my off center light, but did turn their leaves towards it.
                      I will try with a heat source tomorrow, though it's new years eve so I just might be incapacitatyedz


                      Blacklight is UV and photons here carry more energy than the red end of the spectrum where I'm looking. Interesting... very interesting. Bent in half though? Are you pulling my leg? lol

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                        #26
                        Originally posted by f-e View Post
                        So, unsurprisingly, my plants didn't grow towards my off center light, but did turn their leaves towards it.
                        I will try with a heat source tomorrow, though it's new years eve so I just might be incapacitatyedz


                        Blacklight is UV and photons here carry more energy than the red end of the spectrum where I'm looking. Interesting... very interesting. Bent in half though? Are you pulling my leg? lol
                        Not pulling your leg, but probably didn't describe it well.
                        The stem wasn't bent at a 90 degree like a straw, or like when you bend a branch for supercropping, but the plant was bent 90 degree.. the stem had a sharp rounded curve that caused the tops to be completely facing the wall that the light was on. When I walked up to the plant it was bent away from me and I could see only undersides of the leaves.
                        "I have only read fragments of your posts. But I have read enough to know that you can grow some mean herb."
                        --- CVH
                        _____________________________
                        "we growing.
                        till the fucking zombies show."
                        --- Useless.Gardens

                        My current thread

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                          #27
                          I have not hung my soldering iron beside a cutting yet, but this is an interesting quote from Sampas92
                          "i use a 15w halogen bulb with 54w of sils.
                          The other day i made an experience and replaced the 15w for an 100w halogen bulb that i had laying around for 15+ years, the thing is in 2 hours it was the plants were quite perky but the thing i find most interesting was that the leafs were much more cooler to the touch and also sligtly turned to the halogen bulb"

                          Maybe 25% of his visible light was from the Halogen. Based on his LEDs being 100 lumens per watt.

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