1. It's that time again and this time it seems that we have quite the list of contenders. It's time for the winter Solo Cup Challenge. For more info look Here.
    Dismiss Notice
  2. Hey everyone we're working hard on making improvements to the site both on the hardware and software side but we want to include the community with things they would like to see, improvements that can be made, or things that are not liked or don't work well.

    Click here for the Site Improvement thread!
    Dismiss Notice
  3. The Photoperiod Grow Battle kicks off March 15th! Get into CannaZone and sign up now! @Sniper for details!
    Dismiss Notice
  4. We're expanding our seed testing, give your input here!
    Dismiss Notice
  5. Give us your constructive feedback on our grow battle competitions! Click here to give your answers!
    Dismiss Notice

Soil Grow - Deficiency or Excess ?

Discussion in 'Autoflower Infirmary for Sick Plants' started by SpliffScot, Feb 13, 2018.

  1. SpliffScot

    SpliffScot Smoke Cannabis Live with Friends on AFN

    Joined:
    May 31, 2015
    Messages:
    430
    Likes Received:
    1,159
    Reputation:
    1,345
    Currently Smoking:
    Sour Stomper, 24C
    Advice Appreciated

    I’m no noob to growing but this has got me stumped – I cant work out if it’s a deficiency or an overload (lockout) situation, I’m tending to think she got too much potassium rather than it being Cal-Mag deficiency but that’s just based on I know she’s being getting extra CaMg throughout and it wouldn’t explain the thin leaf structure, clawing and chlorosis.

    01.jpg 02.jpg 03.jpg 04.jpg 05.jpg

    Mephisto : Toof Decay

    Day : 44

    Lighting : 2x Mars Hydro 300 96/5W Epi – Cycle
    (was 20/4, been 24/0 for last week << breaking in a new grow space).

    Airpots (customised size 24x24cm – 11L aprox).

    Medium : Soil - Top 10cm = Plagron Light Mix, Bottom 14cm = Plagrom Bat Mix Pro

    Added : Volcanic Rock Dust (don’t think this does anything short term in terms of micro-nutrients but I have a huge bucket of the stuff at the allotment – hey ho – it’s never done any harm :D)

    I must admit I’ve been neglecting this girl a bit. Been too busy building the new stealth cabinet in the last couple of weeks that I wasn’t paying attention to what was happening in the old one. So she’s had a couple of dry-outs (heavy wilting) – largely cause it was grower No.2 in the family that was looking after her (that’s the daughter – the wife just frowns). Also I suspect she has had a heavy feed dose(s) as we failed to communicate what feed had been given.

    Never had any problems with the Bat Mix before, just had to keep on top of Cal-Mag and added a weak 4-4-4 during veg (I take a weekly feed and just dilute it throughout the week) and a PK booster in flower which would take it to 4-4-10. This will have been the last feed type she will have been getting and the one that may have been overdosed.

    The only other factors are environmental – the new cabinet grow space runs a couple of deg C cooler (24-26C) and has a lower humidity (35% - was 45%). So cooler and drier contrary to the norm. I don't normally have to faff with pH (water is a pretty stable 6.8).

    I’m going to try and flush thru the soil mix just to make sure there aren’t any salt build ups – and then reintroduce normal feed and a full Cal-Mag dose after about 3-4 days (once the pot has more or less dried out after its flush soakings).



    Unless anyone has thoughts to the contrary…

    (I’m all up for suggestions as I don’t normally encounter problems in soil).
     
    Tags:
    Waira, namvet25 and Gatorbackbob like this.
  2. Gatorbackbob

    Gatorbackbob I Am What Willis Was Talkin' Bout High Team

    Joined:
    May 29, 2016
    Messages:
    1,476
    Likes Received:
    5,603
    Reputation:
    23,060
    I would say the inconsistent watering periods and dry spells fluctuated your ph levels at the root zone and created an iron deficiency. If you can't read the ph at the root zone to see if it's too alkaline (high) then you'll have to do the less actual runoff method to check soil ph, if it is high, really all you can do is feed in more acidity, depending on how high the ph went, iron is immobile, and will start at the top of the plant.
     
    Waira and Rollin_along like this.
  3. Gatorbackbob

    Gatorbackbob I Am What Willis Was Talkin' Bout High Team

    Joined:
    May 29, 2016
    Messages:
    1,476
    Likes Received:
    5,603
    Reputation:
    23,060
  4. namvet25

    namvet25 AFN Infirmary specialist Staff Member Global Moderator

    Joined:
    Jun 3, 2012
    Messages:
    8,315
    Likes Received:
    16,452
    Reputation:
    23,907
    How close are your lights?Usually when plants wilt like that they are either to wet or to dry.You should be feeding higher phosphorous numbers rather than high potassium like your using.
     
    Gatorbackbob and Waira like this.
  5. Waira

    Waira Growing strange,... Staff Member Global Moderator (SA)

    Joined:
    Mar 11, 2013
    Messages:
    9,025
    Likes Received:
    24,367
    Reputation:
    64,203
    Currently Smoking:
    Think Fast; Atomic; Fairy Frost
    :toke: Spliff- it looks like it's hitting up high only, a clue that it's likely an immobile micronute defc.,... looks like maybe S or Zn,... your in-pot pH needs to be checked to rule out pH lockout,... S will when too acidic, Zn when too alkaline,.... The abuse can certainly kick-off this, or make it worse,... And like Nammy asked, distance to lights, ... too close can also be an exacerbating factor,...:doh:
     
    Gatorbackbob likes this.

Share This Page

Loading...
Loading...