MKP and PS dosage

Can anyone recommend me proper dosage and timing for those two salts, please? In grams per liter.

It's true that MKP should be used in first weeks of flowering and PS (potassium sulphate) should be used in the last two weeks?

Any studies done with higher P in first weeks of flowering and higher K in later flowering (or contra)? Or side by side with exact clones?

Please no BS here, it's not working with me.

Potassium Sulfate 1/4 tsp per gallon. Stop use 2 - 3 weeks before harvest.

MKP is in most nutrient lines already. 1/4 tsp per gallon.

It all depends on what you're feeding your plants. You can easily over fertilize and hurt your plants using chemical salts so be careful.

xtsho said:

Potassium Sulfate 1/4 tsp per gallon. Stop use 2 - 3 weeks before harvest.

MKP is in most nutrient lines already. 1/4 tsp per gallon.

It all depends on what you're feeding your plants. You can easily over fertilize and hurt your plants using chemical salts so be careful.

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How much is 1/4 tsp? Grams are more accurate measurement.
Yea I know salts can be tricky, but I have some experience so I'm not worried. Lowering base nutes a little and then adding those two PK boosters seems a better way for me to optimise their nutrition demands.

The weight could be different depending on the granularity of the chemicals. The chemicals I'm using are fine grained.

The best I could do to convert was weigh some out.

1/4 tsp of MKP came to 1.4 grams
1/4 tsp of K2SO4 came to 1.6 grams. It's a finer grain than the MKP. At least the brand I have.

KonopCh said:

How much is 1/4 tsp? Grams are more accurate measurement.
Yea I know salts can be tricky, but I have some experience so I'm not worried. Lowering base nutes a little and then adding those two PK boosters seems a better way for me to optimise their nutrition demands.

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You should not have to lower base for the sake of either of these unless you were giving too much in the first place. What is the base?, you may not even need Psulf.

Flowki said:

You should not have to lower base for the sake of either of these unless you were giving too much in the first place. What is the base?, you may not even need Psulf.

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I have great results with my methods, so thank you anyway for this comment.
Idea is to replace PK 13/14 with MKP and PS, that's all.
I keep it simple, without pricey watered down nutes you can buy in grower stores.

KonopCh said:

I have great results with my methods, so thank you anyway for this comment.
Idea is to replace PK 13/14 with MKP and PS, that's all.
I keep it simple, without pricey watered down nutes you can buy in grower stores.

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You can't ask for advice on using these together if the main base elements ppms are unknown. Respectfully to others, any advice until then is a guess.

Flowki said:

You can't ask for advice on using these together if the main base elements ppms are unknown. Respectfully to others, any advice until then is a guess.

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Base nutes are just base. You know, base. Then you add MKP and PS to the BASE. Base is happy dose of nutes which provide all the elements plants need without suffering. When you have that base, then you add ADDITIVES like MKP and PS.

Different manufacturers have different levels of elements in their base fertilizer. I think Flowki is actually suggesting tailoring your mpk dosage based on the ppms of the other elements include in your base ferts. Without knowing what your base is & at what strength you are feeding at he can’t give you a suggestion on how much mpk you should use.

KonopCh said:

Base nutes are just base. You know, base. Then you add MKP and PS to the BASE. Base is happy dose of nutes which provide all the elements plants need without suffering. When you have that base, then you add ADDITIVES like MKP and PS.

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If you look at the labeling on many nutrients you'll find that MKP is already in them.

xtsho said:

If you look at the labeling on many nutrients you'll find that MKP is already in them.

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I know that, thanks.

kushedy said:

Different manufacturers have different levels of elements in their base fertilizer. I think Flowki is actually suggesting tailoring your mpk dosage based on the ppms of the other elements include in your base ferts. Without knowing what your base is & at what strength you are feeding at he can’t give you a suggestion on how much mpk you should use.

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OP this is exactly it. You need to give the base details so others can help, it may not be me but somebody will. If for some reason you can't do that then you truly can not take any advice here because if it's wrong you will fry your plants. Salts are a lot less forgiving than liquid feeding.

1/4 tsp per liter or even per gallon of potassium sulfate (K-s) is way to much under any circumstance