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Thread: Getting that rusty look on some leaves.

  1. #1

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    Default Getting that rusty look on some leaves.

    Soil.

    Northern Lights photoperiod

    45 days old, been flowering since day 41

    20 litre pot

    repotted once on day 41, spotting started before this

    Soil is plant magic plus soil-supreme

    Organic nutes, currently 4ml per L, watering as needed.

    Air temps 18 lights off, 26 lights on

    Humidity averaging 40%

    HPS 400 watt

    Light schedule was 18/6 for veg now 12/12 for flowering

    PH : tap water 7.3, runoff 6.5.

    Lots of leaves developing rusty yellow pattern, not sure if this is fungal, deficiency or an effect of the humidifier that i ahd in the tent and have now removed and switched off.

    Click image for larger version. 

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    Default

    What is the PH of 1 liter of tap water mixed with 4ml of nutes? If the nutes are dropping your water significantly then I would start there.

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    Quote Originally Posted by CityDweller View Post
    What is the PH of 1 liter of tap water mixed with 4ml of nutes? If the nutes are dropping your water significantly then I would start there.
    Thanks, i only checked runoff with a ph strip and got ph value frmo my water quality report, so i've ordered a ph tester that'll arrive tomorrow then i can get solid data.

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    Quote Originally Posted by TheGreenFiddler View Post
    Thanks, i only checked runoff with a ph strip and got ph value frmo my water quality report, so i've ordered a ph tester that'll arrive tomorrow then i can get solid data.
    You're in good hands


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    I used to get that, when i used tap.

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    Default

    No spider mites under those leaves? Looks a little like stippling

    Don't think so but always best to have a good close look




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    Tap water ph is 6.3, after adding 4ml of bloom nutes to 1L of tap water ph was 5.4, and the runoff was 4.8 !

    Great for cabbages but not good at all for our green sisters.

    Looking for an organic ph-up.

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    Quote Originally Posted by TheGreenFiddler View Post
    Thanks, i only checked runoff with a ph strip and got ph value frmo my water quality report, so i've ordered a ph tester that'll arrive tomorrow then i can get solid data.
    if you are organic why the ph tester? Mate you havnt tried adjusting it have you?
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    Quote Originally Posted by TheGreenFiddler View Post
    Tap water ph is 6.3, after adding 4ml of bloom nutes to 1L of tap water ph was 5.4, and the runoff was 4.8 !

    Great for cabbages but not good at all for our green sisters.

    Looking for an organic ph-up.
    All you need is a healthy micro flora really. mollasess would be a good conditioner for the herd

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    Will add some baking soda next feed, seems like a reliable way to bring the pH up according to what i've read.

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    Quote Originally Posted by SmobyToker#1 View Post
    if you are organic why the ph tester? Mate you havnt tried adjusting it have you?
    No i tested the ph because of the spotting (which could be a deficiency), i've never had to do this before with autos but this is my first photo grow.

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    Quote Originally Posted by SmobyToker#1 View Post
    All you need is a healthy micro flora really. mollasess would be a good conditioner for the herd
    Thanks, i'll look into that.

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    Fed her again today but added baking soda to bring the pH to 6.

    Bought neem oil plus a soap to mix it with but i won't use it yet since i don't think it's fungal. The bloody stuff wouldn't mix anyway, soap and oil generally don't so i'm not sure why the two products are meant to be a combo.

    She's looking healthy otherwise.

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    Be honest with ya .that looks like mite damage . Look under the leaves for white and light brown spots .

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    Quote Originally Posted by TheGreenFiddler View Post
    Will add some baking soda next feed, seems like a reliable way to bring the pH up according to what i've read.
    Nooo dont do that . Theres so much sodium in there ..by the time youve reached your desired ph . Even just a few points . Its enough to cause serious damage to your roots and will fry your plant dude

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    Quote Originally Posted by Trex View Post
    Nooo dont do that . Theres so much sodium in there ..by the time youve reached your desired ph . Even just a few points . Its enough to cause serious damage to your roots and will fry your plant dude

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    Sorry just seen this, watered her already with soda, then without 2 days ago because i forgot to add it :/

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    oh shit....baking soda??? noooooooooooooooo. also the neem needs warming first and then adding to fairly warm water. and stirred gently not to bubble it up some.

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    Default Looking fine.

    Quote Originally Posted by SmobyToker#1 View Post
    oh shit....baking soda??? noooooooooooooooo. also the neem needs warming first and then adding to fairly warm water. and stirred gently not to bubble it up some.
    Thanks, yes i did that with the neem but still no joy. It has a weirdly vile smell that stuff! Not sure why they didn't mix.

    The mottling hasn't got worse and isn't on new leaves so i'm thinking it may have been the humidifier, which is now out of the tent and turned off.

    She's looking fine, today is day 56, nice to see flowering sites.

    Thanks for advice.
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    That's looking better mate

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    Cant see shit with that blazing hps man

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