Monopotassium Phosphate

This is super high in phosphate and potassium. But just googling I rarely see it mentioned for hydroponics/aquaponics. Anyone know why? Seems to be perfect as far as P and K goes, water soluble, etc.

Thanks!

Search for MKP on this forum. It is used quite often in flower.

OGHomeslice said:

This is super high in phosphate and potassium. But just googling I rarely see it mentioned for hydroponics/aquaponics. Anyone know why? Seems to be perfect as far as P and K goes, water soluble, etc.

Thanks!

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Great stuff. I use MKP to start flower and then potassium sulphate mid to late bloom.

DeepWaterDean said:

Great stuff. I use MKP to start flower and then potassium sulphate mid to late bloom.

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Why do you switch out of curiosity?

I introduce MKP to my nutrient solution (Jack's 5-12-26, Calcium Nitrate and Cal-Mag) starting at week 2.5 of flower, then dial the PPM back of the solution as a whole a bit come the latter couple of weeks of flower.

spek9 said:

Why do you switch out of curiosity?

I introduce MKP to my nutrient solution (Jack's 5-12-26, Calcium Nitrate and Cal-Mag) starting at week 2.5 of flower, then dial the PPM back of the solution as a whole a bit come the latter couple of weeks of flower.

Click to expand...

I’m under the impression that it needs the high phosphorous for flower initiation and beginning development so I use MKP weeks 1-3 but at week 4 or so The amount of P in your base nute is enough and it’s the boosted K that’s needed. So use potassium sulphate weeks 4-8.