Potassium Sulfate PPM/Dosing??

I am wanting to add some K to my feed mix for a few weeks in flower so I bought a bag of k2so4. (0-0-50) https://alphachemicals.com/potassium_sulfate__sop_

But I can't seem to find any info on dosage rates. As in how much per gallon = X amount of ppm rise? Can anyone offer any help?

My K is 200ppm of my current feed and I'm looking to bump it up to 250ish.

Any guidance would be appreciated.

Well I ran it on my calculator and 1 gram per gallon will give:

Potassium = 119 mg/l
Sulfur = 48.6 mg/l

after K comes S

A member on here posted a recipe.
300 grams potassium sulfate mixed in one gallon of distilled water and then fed at 20ml per gallon.
He called it diy terp enhancinator.

Yukondanmac said:

A member on here posted a recipe.
300 grams potassium sulfate mixed in one gallon of distilled water and then fed at 20ml per gallon.
He called it diy terp enhancinator.

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You could even add some potassium chloride to the mix as well. Thats my DIY terp enhancer honestly, Potassium Sulfate and Potassium Chloride. Sulfur, Chlorine and Potassium are all key to building terpenes.

Just FYI:

1 gram per gallon of Potassium Chloride will provide:

Potassium 115 mg/l
Chlorine 125.6 mg/l

1/4 tsp per gallon weeks 5 - 6 of flower for healthy plants. That's about 1.5 grams. Using too much for too long is not good and can cause issues with plants. Also, depending on what you're feeding you may not want to use K2SO4. If you're already using any bloom enhancer then don't add the K2SO4 on top of it. Don't overfeed any nutrient.

Renfro said:

You could even add some potassium chloride to the mix as well. Thats my DIY terp enhancer honestly, Potassium Sulfate and Potassium Chloride. Sulfur, Chlorine and Potassium are all key to building terpenes.

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How much potassium chloride would you add per gallon?

Yukondanmac said:

How much potassium chloride would you add per gallon?

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Depends on what else is in the mix but 1/2 gram per gallon is typical for me. I typically add 1 gram per gallon of potassium sulfate and half a gram of KCl. At this point I have already reduced nitrogen significantly, maybe just 30 or 40 mg/l of nitrogen.

Yukondanmac said:

A member on here posted a recipe.
300 grams potassium sulfate mixed in one gallon of distilled water and then fed at 20ml per gallon.
He called it diy terp enhancinator.

Click to expand...

I prefer 227 grams in a gallon of water. Add a Carb to give a little push to the guys in the soil.
I like 1.5 tsp of DARKBROWN sugar. NO, I don't like molasses!

Use that at 10ml per gallon.

BTW, your Alpha chem stuff. Does not go to solution well! KELP4LESS has a very nice K2SO4.

Now then, You should only be feeding that for about 5-6 weeks. Keeping in mind MY minimum run time is 12 weeks.

Too much K can lower THC production....

Dr. Who said:

I prefer 227 grams in a gallon of water. Add a Carb to give a little push to the guys in the soil.
I like 1.5 tsp of DARKBROWN sugar. NO, I don't like molasses!

Use that at 10ml per gallon.

BTW, your Alpha chem stuff. Does not go to solution well! KELP4LESS has a very nice K2SO4.

Now then, You should only be feeding that for about 5-6 weeks. Keeping in mind MY minimum run time is 12 weeks.

Too much K can lower THC production....

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Do you run it from flip to week 5 or 6 and then stop?

Yukondanmac said:

Do you run it from flip to week 5 or 6 and then stop?

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Yes. If the strain runs long. I tend to start it the last 8 - 10 days of veg. (This is the amount of time I have from last up-potting to the flip. Just the right amount of time for the plant to get a nice rooting in the new soil)

Do you feed anything else after that?

Renfro said:

You could even add some potassium chloride to the mix as well. Thats my DIY terp enhancer honestly, Potassium Sulfate and Potassium Chloride. Sulfur, Chlorine and Potassium are all key to building terpenes.

Click to expand...

I have never heard of the chlorine angle. I am now curious. Link?

Yukondanmac said:

Do you feed anything else after that?

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Goes into my normal feeding schedule.

cannabineer said:

I have never heard of the chlorine angle. I am now curious. Link?

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I've found that it's "sulfates" in differing forms that do the work.. K2SO4 - MgSO4, There are some trying differing other sulfates and have heard some very interesting effects to terps and resulting in buzz effects also. I'm into some sulfate experiments at this time for this effect also... Not enough data to report yet but to say that "sulfates" do work!

Even somebody trying PbSO4 to bring back some of that "old school" giggle/laughing effect in his sativa work...Theory is that much of that left cannabis after the LEAD was removed from gasoline. That put lots of PbSO4 into the air and into the soil. Not a bad observation in my book.

Dr. Who said:

I've found that it's "sulfates" in differing forms that do the work.. K2SO4 - MgSO4, There are some trying differing other sulfates and have heard some very interesting effects to terps and resulting in buzz effects also. I'm into some sulfate experiments at this time for this effect also... Not enough data to report yet but to say that "sulfates" do work!

Even somebody trying PbSO4 to bring back some of that "old school" giggle/laughing effect in his sativa work...Theory is that much of that left cannabis after the LEAD was removed from gasoline. That put lots of PbSO4 into the air and into the soil. Not a bad observation in my book.

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Lead sulfate! Bet that made for a “heavy” buzz.
Personally I believe that what you describe is that the one you mention observed correlation without causation. I’d need to see something peer-reviewed to decide my take on this.

cannabineer said:

Link?

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I googled it just for you, I am sure you can find more if you are so inclined but here is the first thing that popped up.

Renfro said:

I googled it just for you, I am sure you can find more if you are so inclined but here is the first thing that popped up.

Is Your Water Treatment Apparatus Removing an Essential Cannabis Micronutrient? | The Marijuana Times

Chloride concentrated in the chloroplasts become part of the water-splitting process of photosynthesis. Chloride activates various plant enzymes and plays a role in operating cannabis leaf stomata, the guard cells of pore transpiration.

www.marijuanatimes.org

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What is the ideal range in ppm for chloride?

cannabineer said:

What is the ideal range in ppm for chloride?

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I won't pretend to have that number and I agree with the following statement from the previously linked article.



If someone were inclined to jump down that rabbit hole with some in depth experimentation, they could potentially use the information gleaned to develop a lucrative "terpene boost" nutrient additive. Of course it would require a lot of plants to have multiple feed groups of plants including controls, and one couldn't do such an experiment without including the strain variable too. I assume one would mainly be working with potassium chloride, magnesium chloride, calcium chloride, maybe ammonium chloride. Can the same results be achieved with one of the aforementioned compounds or do we get improved results with some combination? The development of the perfect terpene booster would also need to quantify how chlorine collects in various medium types. One may find that with say perlite, the chlorine builds up fast where it doesn't accumulate in other mediums. That's just an example, I have no reason to believe perlite would do that but one would need to include multiple types of growing medium and no medium with DWC. So it would entail a great deal of experimentation requiring a very large number of plant groups. The more plant groups we can run at one time the faster information can be gathered. I agree that university experimentation would rapidly accelerate the process. If I had to guess, I would wager the magic chlorine number is small and that you just need some chlorine available, and that it's probably really easy to go overboard, perhaps somewhere between 5 and 25 mg/l ?

I wonder if there are any studies on the chlorine/terpene relationship involving other types of flowers or other terpene producing plants. Some digging there may prove fruitful.

As to what I have done with KCl, I have only used it during ripening so I don't know what the effects would be if it was used earlier in flower. I would be worried about accumulation in my peat based mix. If I were to mess with KCl earlier in flower it would be very small amounts and likely not every feed.