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Thread: HELP PLEASE - plants not drinking water 3 weeks from harvest

  1. #1

    Join Date
    Jun 2020
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    Default Unanswered: HELP PLEASE - plants not drinking water 3 weeks from harvest

    Hi, I need your help please. My Northern Lights (indica) plants have stopped drinking water 3 weeks from harvest (its 2.5 weeks away now). The leaves are also all turning yellow (they look much yellower than the pics show). It is taking them 6-7 days or longer to dry out. I flushed them two days ago, and that was 5 days after their last watering and they were still very wet. I am going to leave them until they completely dry and give them a small amount of water - if they manage to recover.
    This happened during my last grow, but it was due to heat stress I believe and due to the LED lights being too close to the buds - the leaves ended up all getting burnt/brown look and some fox tails grew on the buds. The plants just stopped drinking water and the buds would not mature anymore. That was during very hot summer, now I am growing in Autumn and it is cooler. I have had two very successful grows before that and they were in summer when it was hot. I have been so careful with this grow after the last time, and I have no idea what could have caused this.
    I've researched the issue and can't come up with anything, except to flush the plants (done) and only give them a little water in future. I was wondering if some pathogen may have got into my tent that is causing these issues, as I was surprised when it happened the last time after never having an issue before.

    - Watering - I had been giving them 1 litre of water every 4-5 days (when they dried) and they're in about 5 litre pots
    - Nutrients - organic - used Professor's Organic nutrients, and Bio Vega at the start. Also used compost teas and Great White mycorrhizae.
    - Temperature - 24-29 degrees celscius. Warm, but I've grown in much hotter conditions with no issues.
    - Lightning - probably been a bit too cautious and kept it around 20 inches away from the plants (I've moved it to 16 inches now). They are a bit small due to that.
    - Humidity - around 50%
    - Roots - I took one plant out and they are white and healthy. They fill the pot but are not root bound.
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  2. The Following User Says Thank You to hughcumberdale For This Useful Post:

    hotshot (09-06-20)

  3. #2

    Join Date
    Apr 2014
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    Have you tried feeding recently? I'm just wondering if the plant is being selective and waiting for nutrients rather than water.

  4. The Following 2 Users Say Thank You to jingo For This Useful Post:

    hotshot (09-06-20), M_C (09-06-20)

  5. #3

    Join Date
    Jan 2020
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    It's fairly common for the leaves to start dying off from the bottom up as they near harvest, particularly Indica. Let em dry out a bit more, then a little nitrogen might help, but don't give too much. If you're only a couple weeks from chop. I wouldn't worry too much.

  6. The Following User Says Thank You to Phytoplankton For This Useful Post:

    hotshot (09-06-20)

  7. #4

    Join Date
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    Try a little dissolved molasses in the water?

  8. The Following User Says Thank You to scootb For This Useful Post:

    hotshot (14-06-20)

  9. #5

    Join Date
    Sep 2017
    Thanked 31,792 Times in 6,093 Posts
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    How big are the pots?

    I'm putting a litre through a 2L Pepsi bottle every other day at the moment, for example. LOLS.
    I'd love to do it and you know you've always had it coming

  10. The Following User Says Thank You to Herbitual For This Useful Post:

    hotshot (14-06-20)

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