Potassium Bicarbonate

First serious attempt at an outdoor grow here in Da U.P. of MI....
Understanding from limited past experiences, PM is a certainty, it's just a matter of how to contain it. Enough research was done to conclude that Potassium Bicarbonate is an effective weapon. Products like Green Cure, Mil-Stop ect....What they all share, is a high percentage of that same active ingredient, and a bit of an inflated price tag, considering the ingredients. I always read the ingredients.

GH pH Up, is Potassium Bicarbonate, and Potassium Citrate, and is dirt cheap.
There is no way, that I can be the only guy who noticed that.
I put a TBS of the powder in a 2gallon bucket with 100ppm tap water. The pH of that solution was near 10.
It has wiped out any early signs of PM on the lower leaves.

Somebody else, tell me you've done this.

Chip Green said:

First serious attempt at an outdoor grow here in Da U.P. of MI....
Understanding from limited past experiences, PM is a certainty, it's just a matter of how to contain it. Enough research was done to conclude that Potassium Bicarbonate is an effective weapon. Products like Green Cure, Mil-Stop ect....What they all share, is a high percentage of that same active ingredient, and a bit of an inflated price tag, considering the ingredients. I always read the ingredients.

GH pH Up, is Potassium Bicarbonate, and Potassium Citrate, and is dirt cheap.
There is no way, that I can be the only guy who noticed that.
I put a TBS of the powder in a 2gallon bucket with 100ppm tap water. The pH of that solution was near 10.
It has wiped out any early signs of PM on the lower leaves.

Somebody else, tell me you've done this.

Click to expand...

I was looking up greencure literally yesterday and came to the same conclusion as you. I think the only extra ingredient in it besides the bicarbonate is a surfactant. Ordered some yesterday on Amazon, much cheaper per pound compared to greencure. I already got some aloe and yucca extract i can use as a surfactant. Notice any burning after application? I was thinking of doing 1-2 tbs per gallon of the potassium but don't want to go overboard.

I haven't seen any negative effects. I sprayed a test branch first, with the intention of waiting a few days to check for burning....The gambling fool I can become, took over and I ended up spraying an entire plant a few minutes later. Then the next evening, sprayed them all. That was two weeks ago, and I've sprayed them all 3 times each.
I did one of the applications just at sunrise with the dew covered leaves.
Could be confirmation bias, because I want it to be effective, but it definitely has yet to hurt anything.

Chip Green said:

First serious attempt at an outdoor grow here in Da U.P. of MI....
Understanding from limited past experiences, PM is a certainty, it's just a matter of how to contain it. Enough research was done to conclude that Potassium Bicarbonate is an effective weapon. Products like Green Cure, Mil-Stop ect....What they all share, is a high percentage of that same active ingredient, and a bit of an inflated price tag, considering the ingredients. I always read the ingredients.

GH pH Up, is Potassium Bicarbonate, and Potassium Citrate, and is dirt cheap.
There is no way, that I can be the only guy who noticed that.
I put a TBS of the powder in a 2gallon bucket with 100ppm tap water. The pH of that solution was near 10.
It has wiped out any early signs of PM on the lower leaves.

Somebody else, tell me you've done this.

Click to expand...

I've used green cure it works great

I've used this in the past. But, I don't like to introduce more water when it gets close to harvest. It just seems to me to defeat the purpose.

https://www.amazon.com/gp/product/B0064GZPU4/ref=ox_sc_saved_title_1?smid=ATVPDKIKX0DER&psc=1

Hey guy's new outdoor grower from central Michigan here and I also bought one can of green cure and also did the research and just bought a 2 pound bag of potassium bicarbonate off Amazon. I was curious do you guy's use a wetting agent of some sort mixed in or just pure potassium bicarbonate? Thanks.

Milk is great too.

Absolutely

Yeah, I did use some milk on a few leaves near the bottom, and it appears to be effective.

pointer80 said:

do you guy's use a wetting agent

Click to expand...

I did one round without anything other than the powdered pH UP, seems to be working.
Im finding very small areas...well what appears to be PM anyway, but it seems the milk, and the potassium bicarb/citrate has curtailed any "outbreak"
So far.