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If yes, what should be my action plan?

It’s my first outdoor grow and we’ve had some cold and humid nights.
I’m trying to do all organic.
Plant is a Northern Light, not yet flowering.

Thanks

  • Lichen The KitchenEnglish
    2·
    5 months ago

    Indeed, powdery mildew.

    I forget what I have aside from it being an aerosol, but usually just a single application works.