Powdery mildew?

You could try dimataceous earth, with dawn dishsoap, baking soda and dishsoap, lactic acid works best of all, you need to change up the ph, high then low, kill powdery mildew fast, fan might need to be turned up a notch also. Pm is a bitch to get rid of. Even if you think its gone don't let up, just my experience. Lost too many plants to pm. It can be where you live too, winter and such. Vinegar will lower ph too, spray away! Best of luck!

Looks like a hot mess. I'm gonna be honest and say it's time to trash them and start over. What kind of extraction fan do you have? Are you getting enough fresh air in. Maybe you need more fans too. The only thing I really like to spray in flower if a H2O2 dilution. It's cheap, kills the actual spores, and doesn't leave residue.

For the next run, maybe add Silica to your feed as a preventative to harden up the cell walls, which helps to prevent PM.

Southernontariogrower said:

You could try dimataceous earth, with dawn dishsoap, baking soda and dishsoap, lactic acid works best of all, you need to change up the ph, high then low, kill powdery mildew fast, fan might need to be turned up a notch also. Pm is a bitch to get rid of. Even if you think its gone don't let up, just my experience. Lost too many plants to pm. It can be where you live too, winter and such. Vinegar will lower ph too, spray away! Best of luck!

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Im using a 6in AC Infinity fan & carbon filter & 2 6in fans one mounted above & below the canopy in a 3x3 tent. I have 3 autos in there & I also have a massive plant from clone that was taken 11-15 that I dont have room to flower. Its been in the tent all of the autos lives. The autos sprouted 11-30. Weird thing is that the clone doesnt seem to have any PM just the autos.

Datcoldboi said:

Im using a 6in AC Infinity fan & carbon filter & 2 6in fans one mounted above & below the canopy in a 3x3 tent. I have 3 autos in there & I also have a massive plant from clone that was taken 11-15 that I dont have room to flower. Its been in the tent all of the autos lives. The autos sprouted 11-30. Weird thing is that the clone doesnt seem to have any PM just the autos.

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I think part of your issue is how you have the plants packed in tight and against the walls of the tent. You aren't really getting the air circulation you need. I have a 4x4 tent, and have 6 fans plus exhaust. No PM.

PJ Diaz said:

I think part of your issue is how you have the plants packed in tight and against the walls of the tent. You aren't really getting the air circulation you need. I have a 4x4 tent, and have 6 fans plus exhaust. No PM.

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So from the pics it looks like PM for sure? Is any of it salvagable?

Datcoldboi said:

So from the pics it looks like PM for sure? Is any of it salvagable?

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It's hard to tell from the recent pics, but the first pics in the thread the PM looked real bad. I mean, you can try to battle it out, but it's only gonna become a tougher battle the further into flower you get. Also consider that there are already spores in your buds from the initial PM that could bloom at any time. Definitely keep your humidity down, and try not to let your lights off temps dip below 60F. Add more internal fans if you can, for better air circulation.

The discoloration should go away after a day and so...

Did you dilute it and foliar spray? Its a few drops per liter as I recall.

I learned the hard way with green cleaner, you gotta turn your lights down or off and you have to have your humidity at least 40% with good air flow or you’ll burn the shit out your leaves

I followed the directions accordingly to treat PM. It was 1/2 oz per 1 Gal. I may have used a drop more than that. I applied using a pump sprayer. The lights were on so I took them out of the tent & applied it in a pretty shaded/dark room. I let it sit for about 90 minutes. Then I used a spray bottle with RO water & kinda misted it down. Let them dry out 30 mins or so then put them back in the tent.

I noticed some black spots on the stems now too. Not sure what it is.