Why you should NEVER use a 10-10-10 balanced NPK fertilizer

Discussion in 'Growing Organic Marijuana' started by Toyboy, Mar 14, 2024.

  1. agree, just like 20-20-20, I would not use these ratio with cannabis. The 3-1-2 ratio he recommend is perfect for vegetation. Trying to flower your plant with 3-1-2 would lead quickly to Phosphorus deficiency and later excess N if continued.
    Basically what he explain at 2:35 is the consequence of using improper balanced nutrients in nature, as the the excess will contaminate lakes and reduce fungi population in your surrounding soil.
     
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  2. Excess organic nutrition can contaminate lake?
    I thought only chemical fertilizers can cause this?
     
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  3. I'm a little confused as to how this discussion fits into the context of growing organic cannabis?
     
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  4. Yes, good point. Should I delete it?
     
  5. It's interesting information. I'm just uncertain how/if it applies to organic cannabis. Maybe if you are using bottled organic nutrients? I have had trouble deleting comments in the past. YMMV.
     
  6. I think it relates to organic too, but I don't understand what he is talking about starting 2:35. If he gave examples, I would prolly understand it better.
     
  7. As far as I can tell, in the simplest terms, it's not possible to give plants the desired 3-1-2 ratio using a 10-10-10 (or 3-3-3, etc.) fertilizer. If you add fertilizer to establish the needed quantity of N, then you are overfeeding P, etc. And besides, you need to test your soil and only provide for deficencies, which could hypothetically be any ratio, depending on the soil's need. So really, a 3-1-2 ratio is pointless if your soil is only deficient in, say, N. But, of course, this applies best to readily available synthetics since organic ammendments will become available at different rates (eg. blood meal vs. poultry feathers for N). Anyhow, the same would still apply for organics, and best practices for re-ammending soil would be based on testing and only adding what is deficient. That involves time and money. The methods described here for no-till etc., will get you on the map and to successful harvests, which is what many prefer, without having to earn a degree in horticulture. Whew! This guy has a website about gardening myths [https://www.gardenmyths.com/] and takes a very dogmatic approach, mostly relying on the presence or absence of peer reviewed scientific literature to make his points. Worth a look if you get into that kind of thing. Peace out!
     
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  8. Okay your message is quite clear and understandable for me. Thank you for that and the link.

    Yes I will be using the methods described here. Currently in progress setting up the pots.

    I need to ignore some YouTube videos.
     
  9. The pollution run off thing is real even with organics, but not necessarily in the ways you may think. Nitrogen and phosphorous can cause unwanted algae, and bacterial blooms as well as growth spurts in plants growing in bodies of water. This can throw off a whole eco system.
    For indoor container plants it doesnt apply quite the same.
    Phosphorous is the rarest nutrient we use for growing plants. I hear as much as 90% applied to crops runs off. Thats why microbes that can mine P can be so important.
    Cheers
    Os
     
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