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Thread: First grow health check

  1. #1

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    Default First grow health check

    Hi guys,

    I've got my first grow getting pretty close to flower so I've changed the nutrients to a zero-Nitrogen liquid fertilizer. I've noticed since that some of the leaves are developing orange spots. I'm pretty confident that the plant is still quite healthy and it's just reacting to the lack of Nitrogen but I'd like to get someone who's more experienced to have a look.

    I've attached some photos below.

    The grow is outdoor in soil. Plant is approx. 4ft above the soil.


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    Picture of the plant

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    Close-up of the spotty leaves

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    Start of flower

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    Start of flower

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  3. #2

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    Nice tree mate However, I believe it looks like a different problem than N, but wait for more experienced comments
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  5. #3

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    Beautiful grow that, mate.

    Definitely not N but I would be looking for bugs under the leaves with a microscope.

    (That's you with the microscope, not the bugs)
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    There is no end to what I want to know.

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  7. #4

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  9. #5

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    Soil or hydro or coco: Soil

    Strain: Strawberry Cough (sativa dominant)

    Photo or Auto: Photo

    plant age: Planted late sept.

    pot size: 60L

    has it been repotted? and when?: Yes. Repotted mid-December

    soil type: 40% Potting mix, 5% blood-and-bone, 55% coir-perlite mix

    nutes or additives used and how often for soil: Worm compost liquids used for veg. Now using zero-nitrogen organic liquid fertilizer (last 2 weeks)

    Air temps (max min): Max 38 Celcius; Min 15 Celcius (overnight)

    Res temps (max min):

    humidity: 80%+

    lighting type and wattage (hps, led, cfl): Outdoor, full sunlight

    Light schedule: Natural, currently ~ 14 (on) / 10 (off)

    ph level: unknown

    EC (hydro and coco only)

    Background EC.


    Grow is in Australia

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  11. #6

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    Nice plant! I agree. Definitely not N issue. Let us know if you find any critters. Also check in the soil around the trunk. Magnification helps loads. Some are very hard to see.

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  13. #7

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    Looks a pest problem tbh . Not sure what exactly . Flip a few leaves .

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  15. #8

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    Thanks guys, will give it a once over with the magnifying glass. I've been doing this as an organic grow without pesticides and would prefer to continue that way. Would anyone be able to recommend a low-impact method of dealing with any pests I find?

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  17. #9

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    @Macky is your friend, I remember he has a special section on the matter.

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  19. #10

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    Does look like bugs more than anything. The plant seem healthy other than those marks.

    Have you checked under those leaves?



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  21. #11

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    Get yourself some neem oil just in case you do find any bugs brother, all the best, G'.
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  23. #12

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    Quick update:

    I've gone around and trimmed any of the affected leaves. I will keep an eye on any others that show the same symptoms while I source a magnifying glass / jeweller's monocle thing.

    Thanks everyone for the help

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  25. #13

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    Hi guys,

    Another update:

    A couple weeks on and I'm seeing a few issues in the leaves. Lower leaves are particularly affected. Bud development seems slow. Some troubleshooting using the index of issues suggests either potassium or phosphorus deficiencies?

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    Any help would be much appreciated.

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  27. #14

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    Another update for anyone keeping an eye on this:

    I flushed the soil until the water running out ran clear. I have only used organic liquid fertilizers so salt build-up should not be an issue, but I figured that the safest move was to reset the nutrients. Then a couple days later I started back up on a P/K only liquid organic fertilizer. The plant has since bounced back with some of the "burnt" patches on the leaves healing. The buds have been looking much more healthy and getting fatter. It has surprised me just how much of the P/K fertilizer she needs to stay healthy in this final stage of flower.

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    "burnt" patch healing

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    lower cola

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    main cola

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  31. #16

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    Any chance you can stick up a pic of the whole plant brother, looks like it would maybe benefit from a wee bit of a trim, all the best mukka, G'.

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