4 Inches is all them girls need?

Discussion in 'Advanced Marijuana Cultivation' started by Cold$moke, Jan 10, 2018.


    Cold$moke Well-Known Member

    Hey all ,
    After a little research I've decided to try air pruning roots of seedlings to hopefully encourage faster root growth..

    If your interested look up DR. Whitcomb air pruning roots .
    Lots of neat info here.

    But basically he says a tap root is a evolutionary defense for plants so they can survive harsh environments by sending its tap root down deep
    In search of water.

    ... but he says that the tap root is unnecessary in the grow room because we provide all the plant needs and is a waste of plant energy.
    He says a large fiberous root system is best

    I encourage to watch the video for impressive test results and im not quoting him just giving you the jist of it.

    Other studies show roots can actually sense gravity and naturally go down even around obstacles (duh)

    Anyways being one that always heard you need to keep that tap root happy
    I never would have thought to intentionally reduce the length of the almighty tap root.

    So i took 6 seeds (freebies)
    Dutch passion auto blackberry kush 1
    Seedism exodus 2
    Seedism lemon gold drops 1
    Thseeds bubblegum 1
    And blimburn green crack 1

    I put them in 4inch rockwool cubes that are elevated on a rack .

    They popped right around Christmas
    And i observed in a day or 2 the tap root went almost straight as an arrow to the bottom of the block then a few days later another ect.

    Now a little over 2 weeks the blocks are filing nicley and i intend to keep them in the blocks till its mostly roots :)

    Then i will transplant into the final systems..
    Hopefully they will explode with roots since they will be allowed to grow as big as they like.

    Which after seeing DR. Whitcombs results im quite hopefull

    So i know other people have done this but has anyone here done it?

    If so was it worth it?

    I know after finding out about it from a youtube guy. Grow pot cheap .

    His video is called the first 4 inches is all you need.
    Hence the name of my title is a shout out to him

    He grew some nice trees that where supposedly autos.
    Ill post pics later as im busy today
    Just seeing if anyone eles has done this

    Last edited: Jan 10, 2018
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    Tyleb173rd Well-Known Member

    My wife hears that everyday.......

    vostok Well-Known Member

    if this shit is really important to you

    look up grafting its a lot easier

    to take an old male/female scion(rootball) and tape it to a very very young fem

    that way you get all the roots you want

    and about 30x? larger than normal

    good luck

    Cold$moke Well-Known Member

    Its not like im putting great effort into it :)

    Plus to me grafting isn't the same as supercharching the plants own root system cause i would have to keep old plants that doesnt sound fun or productive to me but im not a farmer or botanist

    Im just making the roots airprune themselves just as an experiment . But thats how we learn right

    You are correct that I dont care enough to graft a plant .yet;) lol

    But ill sure do the air pruning of the tap root if it makes a difference :) it requires nothing from me at this point except a hand watering every other day

    And after looking into mr. Whitcomb's research I see no reason why it wouldnt work ......other than i dont have a "control" plant next to them

    I appreciate the input for sure! @vostok

    I will post pics but theres not much to see yet just 16 day seedlings in 4 inch cubes :)
    max420thc likes this.

    Flowki Well-Known Member

    Essentially you could put small cuttings into a big air pot and water about 300mil a day for the first week, 400mil next week, and so on?. Or is this initial 4 inch volume set in stone.
    Cold$moke likes this.

    Cold$moke Well-Known Member

    In stone according to Dr. Whitecomb
    Look him up its very impressive @Flowki

    He will explain better than i can :)
    Was mainley seeing if anyone here was doing it yet

    vostok Well-Known Member

    [email protected] after reading ur thread I went onto that YT and watched the rec. vid boring but the one at 17min with the old man was very cool

    suggesting a 4inch pot modified to alter the tap root...I think his accent was to strong for me

    I goota watch again is about trees and burlap?

    if so then the simple addition of a eggshell or similar would cramp that tap root..?

    Cold$moke likes this.

    Cold$moke Well-Known Member

    Even better if you look up DR . WHITCOMB
    His accent is heavy but hes done the research for us glad you at least looked into it :)

    Cold$moke Well-Known Member

    Please excuse how the seeds look ,not my best work; ) first time in rockwool.
    Popped about Christmas time.
    The exodus isnt a runt i fucked with it and stunted her a bit :)

    After airpruning started (about 2 days from hiting light) there is a new bunch of roots every day.
    Will update in a week

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    Cold$moke Well-Known Member

    The guy basically is a tree farmer and he has created the tap root modified pot THATS THE KEY.
    But im making due with 4 inch block as i dont want to put dirt in my room again at this point lol

    . he also has made a light reflective air pots to keep roots happy from intense heat.

    But the whole key to the super root is making the taproot into a horizontal rather than vertical system.

    I got big plans for these girls.

    Some will go to my rdwc and some will go to my
    New meniscus membrane flood and drain table

    This should let the roots grow in straight air within a dark humid chamber with either a pc fan or some air stones just to exchange air in the

    Cant wait till the run im working on is done so i can rip out one rdwc and replace it with the meniscus setup. :)

    Thanks for stopping in vostok
    max420thc likes this.

    Flowki Well-Known Member

    Yeah I seen the vid, warrants a side by side though. The diff between a 4 inch to 6 inch pot is minute, I don't doubt the concept (yet) but still struggle to accept 4 inch pot = the only magic volume. Seems more convenient for him to pick a ball park size and make/sell pots at that.

    I've also seen vids on tap roots that basically say if they get root bound you limit root mass a lot even if you up pot. I think the general concept is to A: not use a small pot initially (4 inch+ if he's right) and B: not to let the tap root get root bound via air prune pots.
    Last edited: Jan 12, 2018
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    vostok Well-Known Member

    Four inches is all you need --Make her explode ...maybe!
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    Cold$moke Well-Known Member

    And those are supposed to be AUTOS

    Cold$moke Well-Known Member

    Could be very true.but im not a botanist so i really couldnt say..

    Dr. Whitcombseems to be set on 4 inches
    It might have been due to cutting cost of a 6 inch pot but why?
    If he did all the research would he not go with a 6 inch in the first place? You could be very right though.

    @vostok yea thats where i found out about dr.w
    But the dr. Also has some other videos
    That are more informative as to why he does stuff.

    @Flowki i dont think there is a chance of it getting root bound for a good long while as the roots keep air pruning and making new lateral roots.

    Basically like an airpot does no root encircling.
    I thought about removing the sides as well on the blocks so it could prune all 5 sides.
    But algae sucks so i was trying to limit that.

    But mabey next time i can make a dark dry air chamber to put the pants in ?

    Anyways its just a easy fun experiment
    That doesnt take much work from me.

    And if i see a notable differences in root mass and structure it will have been more then worth it in my opinion :)

    Thanks for stopping by
    twistedvinesofbud likes this.

    Cold$moke Well-Known Member

    Again the only reason im trying is because of how many trials .
    On roots that Dr. Whitcomb has done.
    Everything he says makes sense to me ,a non professional .

    If you look up his videos he talks of why they dont go with a deeper container i think its in a clip where he says they used to use old milk cartons to grow out of.

    Keep in mind hes a tree farmer not a weed farmer lol but the theories seem sound to me:)

    BloomFielder Well-Known Member

    That dude grows bunk weed!!, which I would expect from autos.
    But I ran this theory and to my knowledge, it was a waste of money spent on 4" Rockwood cubes and attempting to kill the tap root.

    Cold$moke Well-Known Member

    Would love to see your results :)

    Cold$moke Well-Known Member

    And just your comments about bunk weed from autos tells me much :)

    Ive only done one auto but it was great smoke and changed my mind on them.

    How did you run his theory @BoomFielder ?

    Also the guy in the video is doing supposed autos.

    I have never seen anyone take an auto that big, have you? If so where?

    Flowki Well-Known Member

    I'm not saying it doesn't work (air pots or any kind of pruning pot have shown to be superior) but I struggle to accept his notion that 4 inch pot is the key to growing big plants. Obviously the tree below was not started in a 4 inch pot and is clearly not restricted. If you start seeds and allow the tap root to root bound in a small pot the tree (and as your guy showed) mj plant does not reach it's potential, I've seen the vids on that. I'm just saying I think the guy has found a ''minimum'' pruning pot size that reduces or removes that effect and took it to market. From a marketing stance where else could he go?. Air pots of bigger sizes are already well established so the smaller ''rooting'' or ''germination'' sizes is probably a good gap in the market. Crop count issues probably also played a part, I imagine tree nursery's want to fit as many into a space as possible during that low foliage root development stage. But that almost sog like approach does not suite every mj grower.

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    vostok Well-Known Member

    is this not the original vid that you wanted us to watch ....bummer I'm lost?
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