# Day 12 I think it’s White Powdery Mildew? **URL:** \ **Category:** Diseases\ **Created:** [September 29, 2022, 12:17pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804 "2022-09-29T12:17:34Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![IMTOOHARD](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@IMTOOHARD](https://ilgmforum.com/u/IMTOOHARD)\ **Post date:** [September 29, 2022, 12:17pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/1 "2022-09-29T12:17:34Z")
This is my first grow and I noticed white stuff on the leaves after some research I figured it’s could possibly be white powdery mildew I just ordered some Lost Coast Plant Therapy to hopefully combat whatever it is but you guys are the experts so what do you think the cause might be??? I just wanna grow sum fresh bud not sum contaminated bs I’m using 50/50 Coco Perlite mix I greatly appreciate any feedback I can get. ![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/f/5/5/f55ca0f226c398a288716f7ce02398cd706766b5.jpeg) ---
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [September 29, 2022, 12:24pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/2 "2022-09-29T12:24:41Z")
> [@IMTOOHARD](#): > > Lost Coast Plant Therapy Hydrogen peroxide is very effective and a whole lot less expensive. Are you using a humidifier with tap water? It could be minerals that were aerosolized by the humidifier. ---
**Author:** ![Jaysittinback](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaysittinback/32/1226511_2.png) [@Jaysittinback](https://ilgmforum.com/u/Jaysittinback)\ **Post date:** [September 29, 2022, 12:26pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/3 "2022-09-29T12:26:02Z")
I agree because the white in the veins. WPM is usually more round spots, that can be rubbed off, and often between veins. Yours looks like something on the viens ---
**Author:** ![IMTOOHARD](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@IMTOOHARD](https://ilgmforum.com/u/IMTOOHARD)\ **Post date:** [September 29, 2022, 12:37pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/4 "2022-09-29T12:37:46Z")
How should I use the Hydrogen Peroxide?? and honestly I have just been using a spray bottle with PH balanced water I currently do not have a humidifier ---
**Author:** ![IMTOOHARD](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@IMTOOHARD](https://ilgmforum.com/u/IMTOOHARD)\ **Post date:** [September 29, 2022, 12:38pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/5 "2022-09-29T12:38:21Z")
What do you think it could be ?? ---
**Author:** ![Jaysittinback](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaysittinback/32/1226511_2.png) [@Jaysittinback](https://ilgmforum.com/u/Jaysittinback)\ **Post date:** [September 29, 2022, 12:39pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/6 "2022-09-29T12:39:56Z")
I dont know, never ran into that. I had wpm on vegetables so I know that one. ---
**Author:** ![beardless](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/beardless/32/275814_2.png) [@beardless](https://ilgmforum.com/u/beardless)\ **Post date:** [September 29, 2022, 12:42pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/7 "2022-09-29T12:42:02Z")
> [@IMTOOHARD](#): > > spray bottle looks more like water deposits. Use demineralized / RO / distilled water. ---
**Author:** ![Jaysittinback](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaysittinback/32/1226511_2.png) [@Jaysittinback](https://ilgmforum.com/u/Jaysittinback)\ **Post date:** [September 29, 2022, 12:45pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/8 "2022-09-29T12:45:33Z")
ahh maybe that’s why I’m not familiar with it. My leaves don’t see a drop of water after I take the domes off. Dry their entire life… after about a week ---
**Author:** ![JayDawg](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaydawg/32/774534_2.png) [@JayDawg](https://ilgmforum.com/u/JayDawg)\ **Post date:** [September 29, 2022, 12:46pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/9 "2022-09-29T12:46:30Z")
I spritz my babies as well, and just looks like the water evaporated on the leaves leaving water spots or cal deposits. Don’t worry I freaked out too on my first grow. ---
**Author:** ![IMTOOHARD](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@IMTOOHARD](https://ilgmforum.com/u/IMTOOHARD)\ **Post date:** [September 29, 2022, 12:56pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/10 "2022-09-29T12:56:11Z")
You give me hope homie assuming it is just water how should I clean it ? And is there anyway I can prevent it ?? ---
**Author:** ![Jaysittinback](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaysittinback/32/1226511_2.png) [@Jaysittinback](https://ilgmforum.com/u/Jaysittinback)\ **Post date:** [September 29, 2022, 12:59pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/11 "2022-09-29T12:59:17Z")
anybody have a waterboy meme High Quality H2O… now would be a good time. You don’t have to spray mist it now. Just let it grow a bit and see if the new growth continues to do that, or clear up. ---
**Author:** ![JayDawg](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/jaydawg/32/774534_2.png) [@JayDawg](https://ilgmforum.com/u/JayDawg)\ **Post date:** [September 29, 2022, 1:04pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/12 "2022-09-29T13:04:03Z")
Yes, just spritz it on your next water cycle. Get the leaves good and wet, then with a rubber glove on gently rub your finger over the top of the leaf to clean. Also after I spritz I jiggle the plant a little to make sure the water droplets run off. Big droplets could in theory cause magnification issue from grow lights, thus burning your plant. Although I have not encountered this. ---
**Author:** ![beardless](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/beardless/32/275814_2.png) [@beardless](https://ilgmforum.com/u/beardless)\ **Post date:** [September 29, 2022, 1:53pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/13 "2022-09-29T13:53:20Z")
> [@IMTOOHARD](#): > > anyway I can prevent it ?? Spray with demineralized / RO / distilled water. ---
**Author:** ![Se7en](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/se7en/32/1191227_2.png) [@Se7en](https://ilgmforum.com/u/Se7en)\ **Post date:** [September 29, 2022, 3:17pm UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/14 "2022-09-29T15:17:20Z")
Looks to me the leaves could have gotten wet. Looks like my leaves after they’ve had a soap/water spray and dried ---
**Author:** ![IMTOOHARD](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@IMTOOHARD](https://ilgmforum.com/u/IMTOOHARD)\ **Post date:** [September 30, 2022, 3:19am UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/15 "2022-09-30T03:19:30Z")
I appreciate all of yall for the info ---
**Author:** ![Tophat](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/tophat/32/773941_2.png) [@Tophat](https://ilgmforum.com/u/Tophat)\ **Post date:** [September 30, 2022, 4:19am UTC](https://ilgmforum.com/t/day-12-i-think-it-s-white-powdery-mildew/93804/16 "2022-09-30T04:19:47Z")
![image](https://global.discourse-cdn.com/growingmarijuana/original/4X/f/4/b/f4baeb4e34eec167645386ad06592014480047a9.jpeg)