Is this Powdery Mildew?

A

Adverb

Member
Hi Growers!

I'm hoping someone can tell what this is. It's a white powdery substance that I believe is PM.

I experienced PM before in my last harvest, but I thoroughly cleaned out the inside of my tent and all equipment using hydrogen peroxide. However, only a few weeks into a new grow and i'm seeing this pop up all over my equipment.

I'm leaning towards the fact that it's PM again but I don't understand how it could be coming back already. How can I get rid of this completely inside of my growth tent?

Any help would be greatly appreciated
 

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Woedae

Woedae

Active Member
I don't think that is PM. I'm betting you have a humidifier and are using tap water in it. If so, that's a mineral residue. It'll wash out in the sink with a quick hand washing. It also can collect on fan blades and tent walls, cords, ect....
 
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Woedae said:
I don't think that is PM. I'm betting you have a humidifier and are using tap water in it. If so, that's a mineral residue. It'll wash out in the sink with a quick hand washing. It also can collect on fan blades and tent walls, cords, ect....
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Got it, I do use tap water in the humidifier you're exactly right. I was about to update the thread and say that could also be it. I've seen my humidifier cause something like this before but never this bad, I think I was just anxious after experiencing PM last harvest haha. I'll give the tent a good scrub to get these minerals out of here and try my best to use purifies water from now on.

Thank you so much Woedae!!
 
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Tolerance Break said:
Do you run a humidifier? Looks like hard water residue to me.
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I do, that has to be it. Just out of curiosity, do you know if using tap water in the humidifier could harm the plants? I mean i can see that it leaves mineral residue everywhere, could this residue be harmful to the plants?
 
Woedae

Woedae

Active Member
Adverb said:
Got it, I do use tap water in the humidifier you're exactly right. I was about to update the thread and say that could also be it. I've seen my humidifier cause something like this before but never this bad, I think I was just anxious after experiencing PM last harvest haha. I'll give the tent a good scrub to get these minerals out of here and try my best to use purifies water from now on.

Thank you so much Woedae!!
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Anytime bud
 
Jjgrow420

Jjgrow420

Well-Known Member
Pm doesn't grow on things that aren't plants. Spores might settle on it in their journey but it won't grow and fruit on plastic.
 
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