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Thread: Yellow new growth???!

  1. #1

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    Default Yellow new growth???!

    Thought it was N def at first but it’s even worse now.
    EC was 1.0 but upped base nutes to 1.2 to see if they were just hungry. Doesn’t look like it was that.
    PH is 5.0 tonight which I need to up to 5.5 which I let swing to around 6/6.2
    Flood and drain setup but flood for 2 hours as I’ve added airstones in each pot so it’s more like DWC.
    I thought tonight could it be light bleaching as the 600MH is quite low at around 14”?
    Roots look really healthy.
    Any ideas thoughts welcome!






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    you feeding adding cal/mg ?

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    From the top like that is iron deficiency caused by ph, if you ask me




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    Quote Originally Posted by MonsterEnergy View Post
    you feeding adding cal/mg ?
    Nah, my waters really hard as it is.


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    Quote Originally Posted by gardro View Post
    From the top like that is iron deficiency caused by ph, if you ask me




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    Ah thanks! I’ve kept it around 5.5 and I thought iron liked it quite low?


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    Quote Originally Posted by widowsmite View Post
    Ah thanks! I’ve kept it around 5.5 and I thought iron liked it quite low?


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    Im no expert on the ranges in different mediums etc but all the usual deficiencies start from the bottom.

    Iron starts from the new growth at the top.

    Doesnt look like light bleaching as you get canoing and crispy leaves

    Iron or another micro nutrient




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    I’ll try the ph up near 6 and see if that helps cheers


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    Quote Originally Posted by widowsmite View Post
    I’ll try the ph up near 6 and see if that helps cheers


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    What medium are you in? Is there any chance of salt build ups?




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    Quote Originally Posted by gardro View Post
    What medium are you in? Is there any chance of salt build ups?




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    7 litre clay pebbles, it’s an IWS flood and drain.
    250 litre tank
    But I’ve modded it so every bucket has an air stone so I flood for 2 hours and then drain back for an hour so the mix has time to cool down and mix with the nutes in the tank that’s left.


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    Quote Originally Posted by widowsmite View Post
    7 litre clay pebbles, it’s an IWS flood and drain.
    250 litre tank
    But I’ve modded it so every bucket has an air stone so I flood for 2 hours and then drain back for an hour so the mix has time to cool down and mix with the nutes in the tank that’s left.


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    Sorry mate im no good on hydro but im certain the issue is lock out / ph related.





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