what is this deficiency ? help))

Discussion in 'Marijuana Plant Problems' started by baxbax, Mar 8, 2018.

  1.  
    baxbax

    baxbax Member

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    This happen to older leaves new leaves are healthy .

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    this problem shows at older leaves , I suspect something mobile as it's happen to older leaves and new leaves look just fine ( I just think) but don't know which is ? it this look like P deficiency ? or mg ? zinc ?
    Mobile nutrients are nitrogen in the form of nitrate, phosphorus (P) in the form of phosphate, potassium (K), magnesium (Mg), chlorine (Cl), zinc (Zn)

    What Strain is it? Critical kush
    Is it Indica, Sativa or Hybrid? I think it is indica What percentages? ???
    How Many Plants? 1
    Is it in Vegetative or Flowering Stage? vegetative
    If in Vegetative Stage... How Long? 25 days since sprout
    If in Flowering Stage... How Long? -----
    Indoor or Outdoor? indoor
    Soil or Hydro? soilless 100 % coco coir
    If Hydro, Reservoir size?
    If Hydro, Reservoir Temperature?
    If Hydro, what type of Medium?
    If Hydro, what type of Setup?
    If Soil... What is in your Mix? 100% coco
    If Soil... What Size Pot? 1 gallon pot
    Size (Wattage) of Light? How Many? 65 watt cfl
    Is it Air Cooled? yes
    Temperature of Room/Cabinet? btween 20 and 25
    RH of Room/Cabinet? 40 to 50 percent
    PH of Medium or Reservoir? watering with ph of 4.5 - 5.0 - 5.5 - 5.8
    Any Pests? no
    How Often are you Watering? every 3 days
    Type and Strength of Fertilizers used?
    hesi grow > 1.3 ml per gallon
    hesi bloom > 1.3 ml per gallon
    general hydroponics bioweed > 1.3 ml per gallon
    cal mag 2.5 ml per gallon
    Size or Square Footage of Room? cabin
    et grow

    Just watered 2 last watering with ph of 5.0 and 4.5 . because I thought it's P deficiency as P uptake better at lower Ph , after feeding 4.5 ph I read my run off at 6.4
     
  2.  
    baxbax

    baxbax Member

    just watered Now with 5.1 ph , I read run off 6.2
     
    Tim1987 likes this.
  3.  
    Tim1987

    Tim1987 Well-Known Member

    Hey mate :mrgreen:
    Thats a big problem there man. Its a huge swing. Get that runoff down. Dont feed it with a ph any less than 5.5 either. Its asking for trouble. Ph it properly so you know how many nutes are coming out, and accuracy of how much higher lower in ph you have in your media.
    I was gonna say it looked deficient on calcium and mag. But judging by you ph, you have a lockout.
    Id get a ec/ppm metre aswell.
    Good luck
    Tim
     
    baxbax likes this.
  4.  
    baxbax

    baxbax Member

    no matter how much I flush media with 5.5 ph , next day it's high like + 6.5 , I fixed it 3 times to 5.8 with flushing media and next day it raise + 6.5 , do you think I have cal deficiency ? Is calcium mobile ? because this older leaves was fine , as new leaves start grow lower leaves became rust spotted .
     
    Tim1987 likes this.
  5.  
    baxbax

    baxbax Member

    If my ph Is high why should I have calcium deficiency ? calcium uptake good at higher ph ? do you think it's P def because of high ph ? as P absorb best at lower ph
     
  6.  
    Tim1987

    Tim1987 Well-Known Member

    Your ph is too high.
    Your mediums too sweet. Stop the calmag. Cacium is a sweetener.
    You may have hard water. Calcium aswell
    Check your ec/ppm. Thats probably high aswell.
    Dont give it anymore nutes, until youve given it a good flush, and the ph is staying down. Aim for ph 5.8
    Tim
     
    baxbax likes this.
  7.  
    baxbax

    baxbax Member

    in the past days I flushed my 1 gallon pot with 20 gallon 5.5 water to achieve a good flush . fixed ph to 5.7 but the nest day it raised again to + 6.5 :?:
     
  8.  
    baxbax

    baxbax Member

    my run off ph is truly a nightmare
     
  9.  
    Tim1987

    Tim1987 Well-Known Member

    Then i think you need to test your water right away!
    If you dont have an ec metre on hand, get some distilled water from the supermarket. It'll help catch a few extra salts too.
    You need to urgenly find whats going on with your water. If its over 200ppm or so, id be pretty concerned.
     
    baxbax likes this.
  10.  
    baxbax

    baxbax Member

    I'm using ro water it's sweet as candy
     
    Tim1987 likes this.
  11.  
    xtsho

    xtsho Well-Known Member

    Run some half strength nutes to 10 - 20% runoff and leave it alone. Stop worrying about the runoff. I never check the runoff. Worry about what's going in. 20 gallons of water for a 1 gallon pot is overkill. 5.5 PH is too low. PH to 6.0. You are doing more harm than good by flushing with 20 gallons of 5.5 PH water.
     
    baxbax likes this.
  12.  
    Tim1987

    Tim1987 Well-Known Member

    I think you'll find it is
    :clap::clap::clap::clap::clap::clap::clap::clap:
     
    baxbax likes this.
  13.  
    baxbax

    baxbax Member

    thank you , I have no way except leaving it alone , but something knocking my brain it is mobile Phosphorous deficiency due to my high ph and it is moving from older leaves to feed new grow , and no immobile calcium deficiency how immobile nutrient like calcium can move from older leaves , this rust spots happen to older leaves there's 2 option : 1) mobile deficiency 2) something poisoning my plant . please correct me if i'm wrong

    this is picture of phosphorous deficiency from http://www.growweedeasy.com/phosphorus-deficiency-cannabis

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    Tim1987 likes this.
  14.  
    Tim1987

    Tim1987 Well-Known Member

    Im putting money on calcium toxicity mate.
    Calcium deficiency is brown spotting. Lockouts will quite often look the same. Which would explain the sweet water.
    Stop giving it anything less than 5.5 - 5.8 ph aswell.
    Good luck
     
    baxbax likes this.
  15.  
    baxbax

    baxbax Member

    today watered 1.3 ml hesi grow bloom and 1 ml seaweed extract and 2 ml of calcium magnesium for 1 gallon of ro water - Ph in 5.9 - ph out (run off ) > 6.2

    still spreading cal mag deficiency
     
  16.  
    Tim1987

    Tim1987 Well-Known Member

    Check your ec/ppm of your media!
    RIGHT NOW!!!!!!
    You're guessing!
    PH? Adjust
    Ec/ppm? Adjust
    Good luck.
    Tim
     
    baxbax likes this.
  17.  
    baxbax

    baxbax Member

    except my unknown ppm ,is my ph is adjusted ? It's just 0.3 swing on ph ? Is there any way check ppm without ec pen ?
    but I can tell I flushed media too much and my calcium def happen after flushing media too much without good amount of calcium , I did it because I had Iron deficiency . before that never seen a cal def this is picture of plant at day 15 I was feeding with ph of 6.1 at this age , but after having iron def I lowered ph Iron def solved but calcium def started :wall:
     
    Last edited: Mar 9, 2018
  18.  
    Tim1987

    Tim1987 Well-Known Member

    No.
    You need one!
    Or you're guessing just like i am!
    Stop flushing today.
    Buy an ec/ppm tomorrow! Then check it all again.
    Good luck mate.
    Tim
     
    baxbax likes this.
  19.  
    baxbax

    baxbax Member

    plant at day 15 : ph in 6 - 6.1 ph out : 6.8 - 6.9
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    a bit chlorosis at lower leaves day 15 :
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    Increased calcium magnesium up to 5 ml per gallon to solve this little cholorosis , by doing this I blocked Iron uptake and Iron deficiency happened :
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    then I lowered ph to 5 and 5.5 and flushed too much , iron deficiency solved and calcium deficiency happened .

    today picture of plant :
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  20.  
    Tim1987

    Tim1987 Well-Known Member

    Do as i said dude!
    Get a damn metre! Tomorrow!
    You're guessing!!!
    And freaking out! Stay calm.
    PH. Adjust.
    Ec/ppm. Adjust
    Have a look at cal and mag on a chart, comparing nutrient availability and ph. You'll see what i mean. You dont know if its cal or mag. Or whether its lockout. Or deficiency. Until you can check your ec/ppm vs ph. Then go from there.
    Get a metre ASAP
    Good luck
    Tim
     
    Beachwalker and baxbax like this.

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