Powdery Mildew Brew that actually WORKS

This is Ed Rosenthal's Powdery Mildew Brew from his book 'Cannabis Pest and Disease Control'.

After trying tons of remedies, this is the one I have found that works best for both the desolation and maintenance of PM.
I alternate this home remedy with an all natural treatment called Jakes-All-In-One and continue after the infection is gone to maintain garden health.


Ed's Powdery Mildew Brew:

1 liter of warm water
1 part milk to 9 parts water
2 teaspoons baking soda
a few drops of peppermint castille soap
then I add a little bit of liquid seaweed, I never miss an opportunity to foliar feed seaweed.

Its important not to add too much milk or it will cause a inert mold and probably a smell.
I havent had this problem when diluted.

Too much trouble. Get a bottle of Southern AG Garden Friendly Fugicide.

flowerpower0118 said:

then I add a little bit of liquid seaweed, I never miss an opportunity to foliar feed seaweed.

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The foliar feed will not hep with mildew... Maybe part of the problem

Seaweed does help with keeping mildew away but doesnt help to kill it.
It does help to revitalize the plant.

I tried fungicides etc. so far this is the thing that has worked the best.
Try it before you bash it.
Its all natural, and can be sprayed daily without hurting the plant.
Within 24 hours of spraying this on infected areas, my plants were lush and green with no signs of mildew.
No damage to the plants either.
Ive been spraying it every other day and the mildew is still gone.
I grow in a tent, and I am terrible when it comes to tent crowding.
My tents are in a unheated building and I live in Canada, where its cold.
The cold causes condensation to build on the inside of the tents.
This is what causes the mold issues.
This solution has made it possible to keep the mildew gone without having to change my entire setup.
Keep in mind since I have used this solution the plants are still in contact with airborn spores because i havent bleached the tent yet.
But the mildew is still gone.

My flowering tent is not crowded, therefore has much less humidity. Otherwise it would be tough for me to bloom.

I have used a similar method, I didn't add baking soda, works well.

We should pass a law that no powdery mildew can attack cannabis plants and there should be background checks too!

Think of the children!

Datsun 260Z said:

Too much trouble. Get a bottle of Southern AG Garden Friendly Fugicide.

Click to expand...

Nightmare, along with Serenade.

Liquid sulfur in veg and early bloom. Green cure mid to late bloom. Run Green Cure kinda "soft" in late flower or it can burn the pistils. Neither fixes the problem, but they help keep outbreaks away.

Neem oil can be used as both a fungicide and pesticide. I spray weekly in veg. I've never had PM on any indoor grow. I also use it outside on roses as it does a dual purpose of killing aphids and preventing PM. I spray it on squash, cucumber, pumpkin leaves, etc... and it prevents PM which really likes to target those kinds of plants. There may be better and stronger treatments but I haven't found the need to use them.

I would only use it during veg though. If you're getting PM in flower you need to fix the environment.

I got the powdery mildew problem at the end of last summer in the greenhouse. Unfortunately, in the middle of September the weather went to shit and I lost my entire 2019 greenhouse harvest.
I scrambled to take cuttings and save any plants that could be revegged and brought them inside.
Thats how the mold came indoors.

I am happy to say that I have conquered my indoor powdery mildew problem. The plants are doing great now and I was able to finally flip the bigger ones.
Last week I removed everyone from their tents and bleached everything.
The area outside the tents (horse stall)
The floor that leads to the tent area.
Everything inside the tents.
Removed the fans, bleached them too.
Wiped down the heaters/cleaned as best as possible.
Vaccumed up all water and condensation, mud etc with the shopvac (wet/dry vacuum) - i suggest getting one of these if you dont already have one. It doesnt leave my side now.

Resprayed the brew thoroughly as the plants went back in. Made sure to get the stems.
The nice thing about the milk brew is you can drench plants with it if needed to make sure theres no straggling spores.
If you need to drench I recommend removing the baking soda from the recipe, as it changes surface PH which is what helps kill the mold. This may end up effecting the plants if applied too often.

Next I have to conquer the greenhouse so its mold free for the spring.
Im thinking lime and bleach, along with working on the floor and replacing everything that needs to be replaced.
Its going to be a busy spring!