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    HYDRO Calcium deficiency?

    I have a chocolate kush plant that I think has a calcium deficiency. It's had these tiny little rusty looking spots showing up on it's leaves since about day 10ish, it's now day 22 and they are showing up on the new growth. Using GH trio 1/2 strength, hydroguard, and tap water. pH is 5.9, 647ppm, tent stays between 75°F-63°. Before Sunday it was sharing a reservoir with 3 green crack seedlings and they look fine, so do the other plants that were in a different reservoir same nutrients and water.
    From looking on the GWE site I thought calcium deficiency, just wasn't sure if that made sense since my other plants aren't showing the same symptom. Any advice would be greatly appreciated 🙃
    4x4x6.5 grow tent
    (4) T8 for seedlings
    Harvest Pro 600w ballast
    Vivosun deflector, MH/HPS bulbs
    ​Vivosun 6" carbon filter and 440cfm fan
    (9
    ) 5gal dwc res.
    (1) solo cup in 5gal top fed dwc res.
    GH Trio, Hydroguard

    (1) solo cup roots organic coco premix
    GH Trio, Cal-Mag


    Current Grow
    White Widow (seedsman)
    Green Crack (garden of green)
    Northern Lights (00)
    Chocolate Kush (00)


    Solo Cup Challenge
    Alaskan Purple (seedsman)


    https://forum.growweedeasy.com/forum...-my-first-grow

    The splinter is the cost of the wood

    #2
    Can you post a picture of the entire plant as well as a picture of the roots? I’m inclined to say they’ll grow out of it but I need to see more evidence before I say that with certainty.
    Failure is an opportunity for improvement!!

    Comment


      #3
      Obi-Wan one of the pics is from Monday before I topped it, I topped it last night. I supplemented Cal-Mag Tuesday night and by last night the pH had risen to 6.6, added pH down last night. 6.3 is what its reading this morning, I read that Calcium could lockout under 6.2. The Roots look healthy IMO and the new grow looks ok.
      4x4x6.5 grow tent
      (4) T8 for seedlings
      Harvest Pro 600w ballast
      Vivosun deflector, MH/HPS bulbs
      ​Vivosun 6" carbon filter and 440cfm fan
      (9
      ) 5gal dwc res.
      (1) solo cup in 5gal top fed dwc res.
      GH Trio, Hydroguard

      (1) solo cup roots organic coco premix
      GH Trio, Cal-Mag


      Current Grow
      White Widow (seedsman)
      Green Crack (garden of green)
      Northern Lights (00)
      Chocolate Kush (00)


      Solo Cup Challenge
      Alaskan Purple (seedsman)


      https://forum.growweedeasy.com/forum...-my-first-grow

      The splinter is the cost of the wood

      Comment


      • Obi-Wan
        Obi-Wan commented
        Editing a comment
        I agree, your roots look healthy and the plants look good too. I wouldn’t worry about it. In my experience young plants and pre- harvest plants always show deficiencies. The younger plants just need time to form a mature root system. I generally try to keep my pH in a tight window, 5.8-6.2. Lots of growers suggest allowing it to range the full scale of 5.5-6.5 but I’ve never experienced any issues in the tighter window.

      • NickyChicks
        NickyChicks commented
        Editing a comment
        Awesome thanks! I would say for the most part I have been allowing it to range almost full scale between 5.5-6.5, I had kinda been aiming to keep it around 5.8, I read somewhere that some growers say that's a sweet spot for hydro but I suppose that could just be opinion more than fact. Either way, I've been vigilant about checking pH.

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