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Why are my leaves turning yellow

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    COCO COIR Why are my leaves turning yellow

    These plants are about 6 weeks old now, but for the past 2 weeks the leaves have been turning yellow.
    I’m still pretty new to growing and I’ve tried reading up on what the problem could be, but I’m not having much luck.

    I’m using coco coir and perlite as the medium and cana coco for nutrients. I’ve been really careful to only water them when the top inch or two of coco dries out. Initially I was mixing nutrients in with every other watering, but that’s when the leaves started to turn yellow. I reduced the frequency that I add in nutrients, but I’m still not seeing any improvement.

    From what I’ve read, it seems like I’m either not giving them enough nutrients, or I’m giving them too much. I could really use some advice.

    Never let coco go dry feed 1/4 recommended amount every watering.


      Check out these articles:

      It sounds like you are under watering n feeding.
      Don't worry, be happy, grow sticky buds.


        Agree but you don't mention pH? It is essential in coco/perl to keep between 5.5 to 6.5 and to vary a bit in that range for proper nute uptake. Any higher or lower will give you issues.
        Started 9/9/21: 2nd grow: Hawaii Sativa MAUI auto x 2 (had 1 no show)
        Finished Grow: Critical Mass photo - fem x 3 plus 1 clone same
        Medium: FF Coco Loco plus 30% Perlite in 5 gal cloth bags
        Space: 30x48x62 DIY cabinet lined w/space blankets
        Lighting: Bloomspect SS1000 Quantum board x 3 - 300 watts actual draw total
        Soil Supplements: Worm Castings, Guano, Crab Shell, Oyster Shell, Neem and Karanja Meal, Volcanic Basalt Dust (for minerals), Recharge root micros, My filtered tap water runs over 7.5 pH but the soil will do my pH correction
        Ventilation: Vipospar 4" Exhaust Fan w/RH controller, 12" Carbon Scrubber
        Reptile Humidifier/Fogger w/same RH controller, bottom intake fan, 6" heater
        Cabinet on screen porch. N AZ @ 4000 ft.
        Old hippies never go away, they just
        Grow Their Own

        My salute to all who have served
        Semper Fidelis!


          FWIW, I just use Nebula Hazes' Coco-coir feeding schedule. Just go to GWE and ferret it out. You'll be glad you did!
          Attached Files
          A his own mind - , 48" X 60" X 80" 2-in-1 Grow Tent, Flower light: Vivaspectra P2500 LED. Veg light: Mars Hydro TS600 & Mars Hydro TS1000 LED lights. Nutrients: GH Flora Trio/Calmag coco/perlite, pure lemon juice for late flower


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