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Guide to Nutrient Deficiency or Toxicity

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

  1.  
    Stltoed

    Stltoed Well-Known Member

    It's a bitch. I had a rather nasty case of over nitro last grow. I flushed for days on two seperated occasions to no avail. I run an RDWC, so you think it would be easy to kick, but no. One guy told me to use abscisic acid right after a flush, but i ran out of time. Read up on that stuff it sounds cool, but its not cheap. Good luck man.
     
  2.  
    jewsh808

    jewsh808 Member

    Fuck..I've already done so much lol I don't want to over react anymore lol...Yeah its nasty totally learned my lesson on this round..I was able to transplant some babes from a solo cup up into 1 gallons so looks like some are growing out of it
     
  3.  
    Stltoed

    Stltoed Well-Known Member

    It sucks. You want to strangle those little bastards sometimes. I totally get it. I want to work with ABA someday, but not when my plants have downsydrome. Good luck dude. If you need a shoulder to cry on im here. Haha
     
  4.  
    jewsh808

    jewsh808 Member

    I'm starting to see why guys use the "Lucas Formula" ...to avoid nitrogen overuse right??
     
  5.  
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    those are classic overfeeding signs. dark green leaves and tip clawing are sure signs of N tox. tip burn can come from a number of things being too heavy.
    what kind of pots are you using, what kind of medium, what strength are you feeding at?
     
  6.  
    jewsh808

    jewsh808 Member

    Red square bottom Solo cups, 4" square pots and 1 gallon square pots...I use peatmoss/perlite...it procision advantage mix from roots..."soilless" does not come amended at all..I was doing anywhere from 1/4-1/2 tsp per gallon of foliage pro (Dyna Gro) balancing out the pH with protekt...hygrozyme to keep roots healthy...I had my Hanna meter I would never go over 350ppm and kept my pH always 6.2-6.6...I emailed Roots company to ask them just to be sure and they recommended pH for the mix I was using is 6.3-7.0
     
  7.  
    OneHitDone

    OneHitDone Well-Known Member

    One other consideration, aren't enzymes more of a clean up the roots occasionally/later kind of thing? Don't see why you would use enzymes that early on. :confused:
     
  8.  
    jewsh808

    jewsh808 Member

    Thanks...I'll keep that in mind
     
  9.  
    Calicode

    Calicode Active Member

    At first I thought that it was a potassium deficiency but now I'm thinking maybe it's zinc. Can you guys help me. I'm in my 10 week of flower. Looks like about 2 weeks left. Thinking about just water for the rest smh
     

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  10.  
    Go go n chill

    Go go n chill Well-Known Member

    I'm new to growing but I'd agree on the idea of just water till harvest. They may be cannibalizing their nutrients. Might be a little late in the game to worry about it
     
    Calicode likes this.
  11.  
    Calicode

    Calicode Active Member

    Cool. Thanks bro
     
  12.  
    Go go n chill

    Go go n chill Well-Known Member

    Nice flowers
     
    Calicode likes this.
  13.  
    Calicode

    Calicode Active Member

    Thanks bro. This is my first grow.
     
  14.  
    Go go n chill

    Go go n chill Well-Known Member

    Looking real good then!
     
    Calicode likes this.
  15.  
    John Levy

    John Levy Member

    Thanks for this information its helps me a lot in understanding my plantation. currently i am facing yellowing of leaves and some people are giving me advice that use phosphorous and potash solution but i think it is advisable to consult some cannabis dispensaries. but the information you put is healthy and useful
    Thankyou
     
  16.  
    mista sativa

    mista sativa Well-Known Member

    Can someone help me out? I’ve been reading trying to figure it out, and I think it’s calcium deficiency... or possibly the beginning stages of nitrogen burn. I use happy frog and Roots Organics Soil, mixed with about 25% coco with cork and 10% added perlite. Half a bag of worm castings. I added a small amount of blood and kelp meal. I fed the plant two ACT’s of kelp, fish emulsion, bat guano and blood meal the last two waterings. I feel like it’s cal-mag. LMK what you think. Btw it’s started spotting halfway up the plant. The initial one-pointed leaves are slightly burned on tips.
     

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    Last edited: Jan 24, 2018
  17.  
    Go go n chill

    Go go n chill Well-Known Member

    OMG Bro! They are gonna eat you alive on here.those pics suck. Lol
     
    Calicode and mista sativa like this.
  18.  
    mista sativa

    mista sativa Well-Known Member

    My bad. I’ll take pics outside tomorrow. Can you see what I mean in the first picture? Small brown spots. A little bit inside the edge of the leaf around the tips.
     
  19.  
    Go go n chill

    Go go n chill Well-Known Member

    Yes I can see it. I've never had that show up early in a grow. I'm not the best at fixing Sick plants so I'll bow out and listen
     
    mista sativa likes this.
  20.  
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    pics in natural light would help, but...i'd say you do have a slight calcium deficiency, as well as maybe spider mites.
    the coco you added to your soil may be sucking up some of your calcium, i think a good dose of cal mag to start with, then a small dose weekly ought to stop the spotting. also it seems like you may be slightly overfeeding, you put a good amount of stuff in your soil, then you fed them twice in a row on top of that.
    i say spider mites because some of your leaves seem to have damage that's consistent with mites, but its hard to say in that light
     

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