Guide to Nutrient Deficiency or Toxicity

Discussion in 'Marijuana Plant Problems' started by nick17gar, Nov 18, 2011.

  1.  
    Nick Nugget

    Nick Nugget Member

    Very nice girl you got there. I'm not saying you can't do it, I mean it'll definitely grow a plant. I'm just trying to give the plant the best possible environment and I've heard a lot of negative things about miracle grow. Is there any particular reason that you like MG other than the cost?
     
  2.  
    Bowtieguy77

    Bowtieguy77 Member

    I was told by a person that you couldn't grow pot in or with Miracle Grow so I set out to see if they were right or wrong and came to a conclusion. It does a fine job in my opinion are there products out there that work better??? Hell yes but are there any that are cheaper than MG??? Not a chance.
     
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  3.  
    UncleFat-Nug

    UncleFat-Nug Member

    I am running into some kind of deficiency can someone please help me?
    when i feed PH is 6.5 i am using FFOF soil with there nutrients and some cal/mag. 1 month into flowering and 2 out of 5 plants have a couple leafs looking like the picture attached.
     

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  4.  
    ThaiBaby1

    ThaiBaby1 Well-Known Member

    Used MG for years, my wife swears by it. I had a recent problem and thought it was the MG, but checked my water PH and its 8.5! Anything cheaper? yep, I can get perlite for 10 bucks a 4 cu ft bag. Gonna go with that and Jacks hydro ferts. Can't get cheaper than that.
     
  5.  
    Mrjacob274

    Mrjacob274 Member

    Cant figure out whats wrong with this tangerine dream.. 20170102_104650.jpg 20170102_104655.jpg 20170102_104659.jpg
     
  6.  
    Nick Nugget

    Nick Nugget Member

  7.  
    Mrjacob274

    Mrjacob274 Member

    Feeding it general organics. Highest its gotten was 600ppm. Ph 6.3. Under t5s
     
  8.  
    UncleFat-Nug

    UncleFat-Nug Member

    Can someone please help me and diagnose this ? i raised my LED to make sure its not burning . I thought it was from the fan but moved it and seems i am getting more leafs starting to get affected . Really could use some advise and would appreciate it very much
     
  9.  
    Nick Nugget

    Nick Nugget Member

    When in doubt, flush it out. Sometimes if I can't figure it out what's going on with my ladies I'll flush them with pH'ed (6.0-7.0 soil, and 5.5-6.5 hydro) water or distilled water. That way you can rule out salt buildup or an overabundance of nutrients. I've read that often times the affected leaves will continue to die even if the problem is corrected so it's best to judge efficacy of treatment on new growth (this can make it difficult to determine what's wrong with a plant when it's flowering as it produces little to no new growth, only buds). Your plants are in vegetative stage so I doubt it's a phosphorous or potassium but it very well could be. I use GO as well and actually like the nutes. Have you been following the directions on the box cause they always tell you to give the plant more than it needs. 1/4-1/2 strength is more than enough, unless you have a monster plant. I'd say flush, consult the chart below and observe.
     

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  10.  
    Nick Nugget

    Nick Nugget Member

    Can you get a shot of the whole plant? Does it start at the top or bottom? Knowing that will help determine if it's a mobile nutrient or not.
     

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  11.  
    UncleFat-Nug

    UncleFat-Nug Member

    Its starting down low and has now a couple leafs up top starting to to the same. The leaf tips are cripsy like burnt and curling up at the ends and couple tiny brown spots .Was thinking nutrient burn or light burn but i have no clue . There sleeping right now but in the AM i will post pic of whole plant .
     
  12.  
    UncleFat-Nug

    UncleFat-Nug Member

    Please let me know what you think it might be.
     

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  13.  
    UncleFat-Nug

    UncleFat-Nug Member

    here are some close ups. please help . i do not want it to ruin my yield

    G0204181.JPG G0204179.JPG G0174172.JPG G0194177.JPG
     
  14.  
    Nick Nugget

    Nick Nugget Member

    Try looking through this. I'm gonna go with my gut on this one so don't take this as "professional" as I may be wrong. Doubtful it's nitrogen, your plant looks nice and dark green, nitrogen deficiency appears as a yellowing of the plant, it cant be nitrogen toxicity as there doesn't appear to be a claw symptom on leaved and while your leaves are dark I think that's genetics. Most of the immobile nutrients show signs at the top first and leaves typically get lighter in color so I don't think it's that (your leaves look like they're getting darker from the outside to the inside then withering from the tips, you said it also starts from the bottom so prob a mobile element). My money is honestly on a phosphorous deficiency. Definitely one of the mobile elements. I'd just flush it with like 1/4 strength nutrient water to flush out any imbalances and then look for the problem to dissipate. If you're controlling temperature, pH, PPM air flow and all of the environmental stuff then it has to be something with the nutrients or pests. Check this out: http://www.growweedeasy.com/phosphorus-deficiency-cannabis.
     
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    UncleFat-Nug

    UncleFat-Nug Member

    i appreciate your help. I will flush em and hopefully that will work
     
  16.  
    Nick Nugget

    Nick Nugget Member

    Also just keep in mind that cannabis is a hardy plant, while nutrient issues will decrease yields you can still come away with that dank even if the plant is slightly damaged. I have two sour diesel autos that are about 2 weeks away from harvest and they look kinda shitty (lime green color from bad pH and nutrient issues and me being an idiot), but I still anticipate harvesting 1 1/2- 2 Oz. of some straight fire from both. I've heard people just being happy getting the plant from seed to harvest. Don't feel too bad, I've learned so much from my mistakes and when I start my new batch after harvest they're just going to be that much better. Good luck Uncle Fat-Nug. Let me know how it turns out.
     
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  17.  
    UncleFat-Nug

    UncleFat-Nug Member

    Flushed them today ill keep you posted on the final out come
    Its a passion for me for sure. seed to harvest and the time between is constantly on my mind lol. Its a learning experience every grow and my drive for sure is to yield the most i can possibly from them but am for sure happy with whatever i yield . Take it easy
     
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