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Thread: how to prevent mold in a british climate...?

  1. #1

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    Default how to prevent mold in a british climate...?

    ok so i m a relative noob to growing weed... this is my second year growing outdoors in green house.... and almost all of the plants i have grown have succumbed to this deadly little pest really....

    i had a beautiful auto mazar growing and bang , prime cola got struck down....

    this year i decided to go with friesan dew and ams from ghs, and today i found a small patch of mould on the frisian...

    someone suggested i may have overwatered and this might be part of the problem...

    i have kept both ends of the greenhouse open to keep the air circulating..

    so what can i do to stop this problem from reoccuring...... and are there any other specialist strains that i ought to be considering for my climate...
    i have biddy early as my current favourite to try next year.. but i am open and would be grateful to any and all the help i can get from some of you wiser heads ..........

  2. #2

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    This is a cut an paste from elsewhere

    The best way to avoid gray mold is to not give it a suitable home. Since the mold develops only in overly moist conditions, the first line of defense is controlling humidity to keep moisture levels under 50 percent.



    Gray mold and a hint of powdery mildew attack this sativa bud.

    Gray mold is likely to be most severe within the thickest part of the canopy, where air circulation is poorest. Thick outdoor plants can be spread with twine or netting to improve airflow. Remove interior and weak branches to improve circulation. Fans assist in mold prevention by removing pockets of high-humidity air surrounding the leaves and flowers.


    Don’t foliar feed plants during the last 30 days of flowering because moisture may become trapped inside the buds. Foliar feed early in the day during vegetative and early flowering so moisture on leaves or buds has a chance to dry before darkness. Watering the garden at the beginning of the light period or early in the day will give any excess moisture on the leaves an opportunity to evaporate.

    Cut out and remove the affected portions of the plant or bud, or remove it entirely to reduce potential host sites. Destroy any infected material, and sanitize any tools to prevent them from spreading infections. Moldy weed should be thrown out, although unaffected buds from the same plant may still be consumed.


    After removing all signs of infection, correct the environmental conditions. If circumstances do not allow the environment to be controlled, use preventive measures such as applying Bacillus subtilis (QST 713, known by the brand name Serenade), or a fungicide like Ed Rosenthal’s Zero Tolerance Herbal Fungicide, which includes potassium bicarbonate. Fungicides are more effective when used preventively, so apply at the beginning of the wet season. Some gardeners use sulfur to treat at-risk or infected plants. It can be applied as a powder, in sulfur dioxide mats, or from sulfur pots. Potassium bicarbonate prevents mold germination; sodium bicarbonate (baking soda) can be used as a substitute. Cinnamon, seaweed, D-limonene (citrus oil), and chamomile sprays have antifungal properties and will help control an outbreak.

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    Hey dude, can we see a pic of your greenhouse? Are both ends of the green fully open? Or just a a jar open?


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    I put on the door if my poly tunnel
    A part of a dog cage, stops animals etc and allows air circulation when the door is closed.

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    Best way is to grow Autos & start early so they are harvested before the cooler nights set in
    It's Not What You Know, It's What You Can Prove

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    i ll get some pics up later if i can

    the main door is always open, there s a vent low down at one end...

    and there are roof vents all along the side.... so there should be plenty of airflow..

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    autos yeap tried a few of them too...... dinafems blue cheese, critcal 2.0 auto, roadrunners, automazar, +speed auto

    i do grow some autos also but this is my first year with the big photos.....

    need more yield....... lol

    autos are great but i want to start cloning next year... and shaping my plants to fit the space more efficiently....

    the frisian this year grew too much so i ve had to hst and multiple top it....green house is about 7 ft high.....and i wanted the top buds not to touch the roof for the precise purpose of stopping condensation runoff from the plastic roof...
    Last edited by anruari; 20-09-16 at 01:13 PM.

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    how to prevent mold in a british climate...?


    Immunise from the off...Plant magic granules when you pot up and maybe some Great White (Trichoderma)...Add liquid silicon (silica) and Aminos during the plant's life cycle...These will help make the plants strong and resilient to many pests and mold spores...

    Regards BL

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    woah woah woah hang on a moment,,, what are magic granules? and what is great white(trichoderma)?

    will this actually really help?

    in what form do i purchase liquid silica and aminos?
    Last edited by anruari; 20-09-16 at 02:23 PM.

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    i seem to have problems posting pics....

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