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Difference in NPK?

Discussion in 'Nutrients' started by TheHero, Sep 12, 2017.

  1.  
    TheHero

    TheHero Member

    Hello. Could someone explain me difference between these two NPK parameters - NPK - 1 - 2 - 3 and 2 - 4 - 6 or 5 - 10 - 15 and 10 - 20 - 30, as an example.
     
  2.  
    budman111

    budman111 Well-Known Member

    An NPK of 1-2-3 ratio has 1% N - 2% P and 3% K
    2-4-6 has 2% N - 4% P - 6% K
     
    churchhaze likes this.
  3.  
    TheHero

    TheHero Member

    So, probably 1-2-3 has to be used twice as much as 2-4-6 to get the same amount of npk?
     
  4.  
    budman111

    budman111 Well-Known Member

    Correct.
     
    churchhaze and TheHero like this.
  5.  
    TheHero

    TheHero Member

    Umm.. I bought once a nutrient bottle with some NPK.. like, cant remember the ratio, but there was a "(50% +-) " after each ingridient.. is that normal?
    So, N could be 50% less and P 50% more that advertised and it changes everything..
     
  6.  
    budman111

    budman111 Well-Known Member

    Some dogy companies sell something like 10-50-30 which would fry a plant but they sell it becaude growers think it is a good strong NPK, a very unscrupulousness business indeed.
     
  7.  
    ruwtz

    ruwtz Well-Known Member

    I'm being a nit here but nothing wrong with 10-50-30, its all in how it is used. Different fertilizers for different applications.
     
  8.  
    MJCanada

    MJCanada Active Member

    I've also been reading a fair bit about the soil food web and what really strong fertilizers end up doing to that web(basically upsetting the ecosystem and it collapses).

    In potted plants, it's perfectly fine because we usually aren't relying on the soil food web to support the plant so synthetic or otherwise... slapping a shit ton of nutes, as long as the plant can take it, is perfectly fine.

    When you see 15-30-15, vs 3-6-3, it's simply the concentration.

    When you feed, you should pay attention to ratio (including micro nutes), and EC/PPM (total amount of nutes).

    Plants like certain ratios. For soil grows, the best I can come up with for cannabis with all my research is that they generally like 3-1-2 or 2-1-3(lots of evidence for both) during veg and a 1-2-3 for flower. Some say that after the first 2 weeks of flower you start reducing the N. It's said a ton, but there is more consensus over the years on the 1-2-3.

    Warning: This is my personal sense, given all the information on the various growers forums and youtube videos I've consumed...

    Also, plants can only take in so much before they start hurting themselves. Don't let them snort the whole bag... little bumps with water between :P
     
    a mongo frog likes this.
  9.  
    budman111

    budman111 Well-Known Member

    yes, at 1/4 strength and the bottle lasts 4 times longer. ;-)
     
  10.  
    ruwtz

    ruwtz Well-Known Member

    Or different species or soil type or growth cycle or climate and so on.
     

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