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 Effects of Light Intensity on Plant Growth

Discussion in 'Autoflower Guides & Tutorials: How to Grow' started by Olde School Player, Apr 11, 2018.

  1. fettled6

    fettled6 Hydro and DIY chum(p)!

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    Yes mate, at ages up to around day 14 my girls always seem to lag a little compared to soil or Coco but soon after that they really fly!

    I'll get a pic later today for you.

    I have skipped the t5 in the past and that's when I've seen some stretchy node spacings under 600w MH

    A few things other than the light that I think have introduced excessive stretch (as opposed to the desirable type) spraying with opticfoliar and using fish tank water (loaded with N)

    These 2 things at times seem to promote extra stretch, anyhoo, that's all for now.

    f6
     
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  2. fettled6

    fettled6 Hydro and DIY chum(p)!

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    IMG_20180618_142335.jpg
    Here is the girl @ day 10

    IMG_20180621_174042.jpg
    And now @ day 15 and going strength to strength daily!

    I want to actually see some stretch right now!
     
    Last edited: Jun 21, 2018
    Olde School Player and stedimed like this.
  3. Olde School Player

    Olde School Player Celebrating 44th anniversary of my 1st grow

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    @MedGrower @Waira @fettled6 @HemiSync @Nosias and any other followers I may have missed... I smoke weed & sometimes I forget shit

    Haven't done an update on my latest TH Seeds Auto Original Bubblegum for about ten days, so it's time for a little bud porn.
    This strain usually runs 75 to 84 days but I believe this pheno will finish early.
    These pic's were yesterday, day 59, and she's getting close.
    Here's the tent shot, you may recall this is a 5 sq. ft. tent, 2'3" X 2'3". She's not crowded but is filling the tent side-to-side & almost front to rear:

    [​IMG]

    Trich's are clouding up but the only ambers I see are damaged ones around an edge of the test clip piece of calyx. I think zoom works if you double-click this pic :

    [​IMG]

    Tent temps are holding steady at 65 F lows / lights out to 78 F highs near end of lights-on. Reservoir temp has crept up a bit from high 60's to 72F, but that's still safe, no need for cooling at this time.
    I have kept the light (325W Mars-700) at 20" for several weeks with no signs of light stress, so I'm happy with that for now. Once I take the top buds I usually drop it to try to give the lower secondaries some color, but I really don't think I'll need that. The stretch this grow did under my HID for veg opened her up beautifully, so even the lower secondary & tertiary buds are full and hard. I'm betting almost no popcorn from this one.
    PPM's had been running stable around 1030ppm since late veg and transition to bloom. But over the last week it jumped - she went from 1050 to 1160 in two days. Part of that was a little extra Flora Bloom and KoolBloom that I always add at the end of my bloom formula regimen. But with the spike in PPM's she's telling me she doesn't need it, so I started diluting by topping off with RO water with CalMag only. That's one reason I suspect she is approaching harvest time early - she continues to drink but is not needing the nutes like she did earlier.
    Will she go two more weeks? Probably not but we'll see what the trichromes say by the coming weekend
     
    Last edited: Jun 28, 2018
  4. Olde School Player

    Olde School Player Celebrating 44th anniversary of my 1st grow

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    Just got back from a party weekend in ChiTown & the trichs had taken a big jump, all cloudy with about 5+% amber, just where I like them. So I spent the afternoon taking & trimming the major top colas. Here's a pic of the trimmed and hung top buds with a 500mL / 16.9oz water bottle for scale.

    [​IMG]

    There's nine more clusters of secondary buds that will come down tomorrow, guessing about 1/3 more by volume / weight to add to the buds in the pic.
    I'm awful at estimating yield on bigger plants, so anyone who wants to venture a guess, have at it!! Or you can wait another day or two when it's all down and hung to start drying.

    No... wait... did I say that's a 500mL bottle??? Man am I dumb, I really must have damaged some brain cells this weekend. That's a 5 gallon water bottle from the drink dispenser used for scale. Don't know what I was thinking... 500mL my ass... nobody grows buds that little
    :face: :crying:
     
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  5. fettled6

    fettled6 Hydro and DIY chum(p)!

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    IMG_20180702_195913.jpg
    This is day 25, and now under 600w MH 18" from canopy.. as you can see she is hitting the afterburners!
    Can't get a reading off the Lux app, it tops out at 370,000!

    600w HPS after one week as sex is showing
     
  6. fettled6

    fettled6 Hydro and DIY chum(p)!

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    IMG_20180706_164151.jpg
    Day 30 mate, as you can see from just 5 days of 600w MH she is stretching how we know HID consistently does! HPS from now on but this girl may get to finish under 860w CMH haha!

    Awesome nugs btw OSP! :drool:


    f6
     
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  7. Olde School Player

    Olde School Player Celebrating 44th anniversary of my 1st grow

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    This thread started as my Light Intensity research project, and I fully intend to resurrect that topic on here in the coming months. But as part of my research on stretch I experimented with veg and transition under HID, so this thread took a detour as a grow thread with that technique. So this is my f
    inal update on my TH Seeds Auto original BubbleGum.

    After the pic in post # 104 I added a 3rd string of hanging buds and a small box of smaller buds that were too little to hang. So now she's dried, partly de-boned (I have this affinity for large buds and always keep a few for smoke and to show off) and has been moved to my curing containers for several days. She only lost a few grams from Monday to Wednesday so the drying process is pretty well done. And that beautiful hint of skunk has come back along with that sexy indica twang. I may lose a few more grams during the cure but I'm close enough to call it. 224grams / 8 oz. on the nose final yield. So this grow's reverting to HID for veg and transition followed by bloom under LED was a success. Well, I'm not grinning for 8 oz., especially with this strain, but I'm mildly satisfied. Grins start at 10 oz.

    But the funniest thing keeps happening to me when I reach the curing stage. Maybe someone can clue me in on how this happens every time I cure a new grow? One of my spillover curing containers just up and disappeared. A "spillover" is where I had enough bud volume to fill two large curing containers with a small one to finish. 22g just up and disappeared. And mysteriously, the container appears in the dishwasher. And a full stash jar appears in the refrigerator. And strange new smells of an old girlfriend, once gone but not forgotten, now remembered once again, wafts through the air.
    So I ask the wifey if she knows anything about that, and all she has to say is "How about some beef brisket for Dinner? I laid out a package yesterday." Yeah... right... like that beef brisket took my weed. Everyone knows it's the weed that takes the brisket.

    Next stop - DinaFem Blue Cheese Auto. Transplanted on Tuesday. Starting a new thread for that in the next couple of days, going to keep this one to resurrect for its original purpose of light intensity research. But that's a Fall project, so stay tuned.
     
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  8. pop22

    pop22 Frankensteins Lab Leader CannaZone Product Tester (Tier 2)

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    haven't kept up with this thread, but I'm going to go thru it.

    And maybe your the guy to answer a question. in outdoor plants. On lets say today, at what point is there enough light for photosnythesis to begin? at what point do we calculate the photo period? At actual sunrise and sunset?
     
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  9. fettled6

    fettled6 Hydro and DIY chum(p)!

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    @pop22 yep! There are people playing with smart controllers to mimic sunrise and sunset. Need to research this more to understand what scaling brings to the equation.. :chimp:
     
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  10. midIN

    midIN always learning.

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    My brother works for a huge lighting company he's a designer and is currently building a cob light system in his grow room that is timed out and adjusted to mimic sun rising and setting, it's pretty cool what he's got so far but his plants get light moved from left to right now as his timers tell it to.
     
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