Fert ratio - soluble and insoluble

sexycybe

New Member
I couldn't figure out where to post this conundrum so i did it here, they are outdoor plants :)

So i bought a couple of bags of potash and phosphorus.
I am trying to make a 0-5-4 ratio fertilizer for flowering.

All %'s are %w/w

The potash has 41.5% potassium and 17% sulfur (both as sulfates)
It has an NPKS of 0-0-41-17.

The Phosphorus is 14.7% phosphorus.
6.3% citrate soluble
8.4% citrate insoluble

does this mean for every 100g of potash i use 226 grams of phosphorus or do i take into account the citrate insoluble phosphorus and make it to every 100g of potash i use 527g of phosphorus?

Thanks for any help
SxC
 
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