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DWC plant leaf issue

Discussion in 'DWC/ Bubbleponics' started by bongdan, Nov 15, 2017.

  1.  
    bongdan

    bongdan Well-Known Member

    Hey guys,

    I have some issue with one of my plants, she always get some nasty burns on leafs. Sometime more and sometime is spreading on almost all leafs, I changed water few times, ph around 5-5-7 I try to keep it stable around 6, ec is low 0.9 and no sign of getting better, roots looks good she drinks a lot of water but I cannot find the issue. I use Long flowering powder feeding and I added Cal-mag last 2 weeks and flushed many times. She is in third week of flowering stage.
    Anyone knows some possible cause? 20171112_191656.jpg 20171112_191651.jpg
    Thanks
     
  2.  
    70's natureboy

    70's natureboy Well-Known Member

    I always figure those copper colored leaves like your 2nd pic are phosphorus burn. I'm not positive because your EC isn't bad. I usually stay under .7 EC and I would have problems at .9. Other people run way higher and don;t seem to have problems.
     
  3.  
    rkymtnman

    rkymtnman Well-Known Member

    that would be my guess of your problem. NPK ratio is probably not good for cannabis

    more info on your nutes needed
     
  4.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Too much K locking out Mg?
     
  5.  
    bongdan

    bongdan Well-Known Member

    Is getting worst guys....do you think the nutes are the problem ? I use Greenhouse powder feeding long flowering N-P-K-Mg: 18+12+18+(1.2)
    At this point I don't know what to do to stop this problem. Weird is I have other 3 other plants in the box and they don't have any problem, that's why I didn't change the nutes yet.
    :cuss::wall: 20171117_103421.jpg
     
    Last edited: Nov 17, 2017
  6.  
    70's natureboy

    70's natureboy Well-Known Member

    Are they all the same strain? The other 3 may start doing it eventually. I would stop feeding for a week or so and see if it improves.
     
  7.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Theres only 1.2% Mg.

    Tell us everything you are using man. Show us labels to make it easier.

    Ideally you want a K:Ca:Mg ratio of 4:2:1

    If thats the only Mg the plant is getting thats like a 14:1 ratio K:Mg
     
    rkymtnman likes this.
  8.  
    bongdan

    bongdan Well-Known Member

    Ii have 1 same and 2 different. the one who is same is ok no burn spots.


    I added Cal-Mag for the last 2 weeks but no improvement.
    I used only Green house powder feeding for veg period and flowering also until I saw the problem then I started to add Cal-Mag and Some seaweed and flushed few times.
    I also tried to give her very little food and showed no improvement. I will flush again and change nutes for her.
     
  9.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Why would you flush or reduce nutes?

    0.9EC wasnt over feeding.

    Those nutes are trash from a trash seed,company in it for profit$

    They dont even have calcium or sulfur. Two very important nutrients.

    IMO way too,much ammoniacal nitrogen
     
    Last edited: Nov 17, 2017
  10.  
    bongdan

    bongdan Well-Known Member

    She showed signs of burns and I tried to eliminate all bad possibilities.
    I hope the different nutes will solve problem
     
  11.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Use jacks 5-12-26 and yaraliva calcium nitrate
     
  12.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Throw those nutes,in the garbage or use them in soil.

    They have no business in,a hydro setup
     
  13.  
    firsttimeARE

    firsttimeARE Well-Known Member

    At 0.9EC? Ill eat my dick if they were burnt at 0.9EC
     
  14.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Look if you are serious about growing. Go to JR Peters website and buy a 5lb tub of 5-12-26. Thats 2252grams. Depending how big your setup is get a 25lb bag as the price point is way better. $50 for 25lb vs $20 for 5lb. Pickup some yaraliva brand calcium,nitrate. Again 25lb bag has a better price point but may not be sensible for your setup.

    3g/gal 5-12-26 and 2g/gal calcium nitrate. I make stock solutions with distilled,water so it equates to 1oz/gal for easy measurements. This will,be about 1.4EC with my,tap it comes out to 1.6EC final. I aim for 1.2-1.4EC total so I go a little less than 1oz/gal.

    I bought a 5lb bag of monopotassium phosphate but I dont even use that anymore. I may experiment in the future again with it and see if it,makes a,difference.

    25lb bag of jacks and calcium nitrate cost me $90 and will,make,over 5000gallons.
     
  15.  
    firsttimeARE

    firsttimeARE Well-Known Member

    JR peters is a lab. They specialize in nutrients and water testing.

    Greenhouse cant even,make good seeds which is what they specialize in, not nutrients. They got into that market for pure profits.
     
  16.  
    bongdan

    bongdan Well-Known Member

    I was not sure of the nute quality because I had good results in the past with powder feeding from green house but was mixed with some others and maybe thats why.
    I will know for sure now when I change the nutes.
     
  17.  
    bongdan

    bongdan Well-Known Member

    Thanks for info, for sure next time I will try different nutes, not sure if JR is in my area but will look for it.
     
    rkymtnman likes this.
  18.  
    rkymtnman

    rkymtnman Well-Known Member

    if you can't find them, here's a couple of others that will work fine:

    GH maxibloom
    GH floranova bloom
    dyna gro foliage pro
     
  19.  
    firsttimeARE

    firsttimeARE Well-Known Member

    They from PA. Order them,through their website. Cost me $15 to ship 25lbs.
     
  20.  
    firsttimeARE

    firsttimeARE Well-Known Member

    Still equates to 0.015 cents a gallon with shipping.

    $0.78 a whole grow.

    I spend about $1.5 per plant on,nutrients for the whole grow. Veg and bloom
     

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