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Thread: Marks on leaves

  1. #1

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    Default Marks on leaves

    I have a Critical 2+ Auto 34 days since seedling. It's been growing fine in BioBizz AllMix with no added nutrients. When I went to check this morning I saw these marks.

    I noted yesterday that two of the bottom leaves (not the cotyledons) had withered and browned but I attributed this to sunlight deficiency. I fed this morning with 1ml Bio bizz Fish Mix per litre of water, the first feeding the plants have ever received.

    Grow area is 22 degrees today but I plan to bring temp up with a greenhouse heater so hopefully it will reach about 25 later. I have a heating pad under the plants.

    warm regards

    Richard
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  3. #2

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    Default

    I reckon it’s a calcium deficiency. The photos are quite poor to be honest. Maybe a photo of the hole plants with lights out will be good. Other than the spots the leaves look nice and green.
    Are they flowering yet? I would hit em with an calmag foliar feed, 2ml per litre.

    If I can remember rightly I had the same problem when I started in biobizz allmix.


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  5. #3

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    Thanks. I tried to take better photos but they came out blurred. Now I have the grow area sealed until morning (to avoid odor spread throughout house). I am not sure what stage they are at. If you can tell me based on these other, blurry, photos please let me know.

    I ordered Calmag stuff from Amazon. Arriving tomorrow. Is the foliar spray a one off thing? I have 4 plants. Should I spray them all? How liberally should I spray?

    Thanks so much.

    R
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    They are in flower. I don’t know if I would risk giving them a foliar feed at this stage as you don’t want to encourage rot. Maybe feed through the roots. Feeding through the roots will take longer to take effect.
    If those bits are small and fluffy like you could still give a foliar feed but just don’t spray the buds direct.
    If you go down the foliar feed route then get a spray bottle, fill it up with 1L of tepid water put in 2ml of calmag in give it a shake then spray the plants. Make sure you spray under the leaves aswel as the tops. Give em a good spray.
    I tend to do this just after lights go out. Also lift the lights right up high until the plants are dry then lower back down to there normal position. The reason I do this is because water droplets will cause the light to magnify and burn the leaves.
    I would do this to all the plants.
    I’m not to sure on wether or not foliar feed is
    Your best option as I can’t quite tell on the bud size/density. Someone with more experience will pop there head in shortly.


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  9. #5

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    Are those spots on the bottom leaves?

    In your third post with 5 pics... On the second pic I can see water drops sitting on the leaves.

    If your using hps or high power LEDs it could be causing it to magnify and burn/mark your plant.

    If it's further up away from where you water than it won't be that.

    You have cal/mag on the way though, so your covered

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