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Thread: PK: What is the difference to final yield?

  1. #1

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    Default PK: What is the difference to final yield?

    So if you ran two clones say, one with PK13/14 supplement and one without, what would be the approx difference in the final yield ?






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  3. #2

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    I can't really answer as I grow from seed... but up to 20% would be my answer

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  5. #3

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    Ok thanks. I think she's had enough PK then #frazzled




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  7. #4

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    last time i tested this it was less than 10 grams, and that was total yeild from 8 cuts in hydro, 4 got pk, 4 didnt. each plant was between 8-12 ounces.

    save your cash, its not needed....although saying that im using it in my latest grow, but havnt used it for years.
    this was no pk, just grow and bloom nutes, no more than 1.2ec
    Click image for larger version. 

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    it also seems to cause more issues than it benefits them imho, going off all the problem posts.......
    Last edited by bigbadbillybob; 16-02-21 at 12:36 AM.

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  9. #5

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    PK was first marketed as a flushing aid. High N in uncured bud is a lung buster. Only give PK during the last 2 weeks and the plant gets some nutes while being starved of N. Nowadays, grow gear is much more affordable and efficient. Only a shortage of space stops a grower from always having a supply of fully cured bud so no need to flush if you're patient. Somehow, PK became known as a boost. Which is the sexiest marketing term, 'PK Boost' or 'Nitrogen Reducer'?

    To answer your question, no yield difference at all. Any yield difference that you might attribute to PK will be from other factors. Simple logic is enough to prove that.

    Basic nutes have N, P, K and Micros. Take another bottle of nutes and somehow filter out the N and Micros. You now have a bottle of basic nutes and a bottle of PK. For the same final ec, adding PK to the basic nutes will reduce the amount of N and Micros in the mix. How can that yield more than what basic nutes can give?

    I use the lucas formula, which is bare minimum N. In effect, the PK is already added without reducing the Micros. It's not the highest yielding nute regime, I use it for convenience. Whatever the strain, I get ~95% of what a nute regime tailored to that strain gives.

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