What are you asking for exactly?
Are you asking for specifics as in PPM feeding charts based upon various stages of growth? How to offset the potential acidity of the fertilizer with your soil and water type? Are you asking how to obtain it? Are you asking how to mix it? Etc etc.
I was recommended this from a local ganja farmer that uses not only Jack's Classics fertilizer but their professional fertilizers. Keep in mind that he indicated to me that the final PPM that he came up with after much testing was the PPM they list on the bag to feed at. Huh crazy Jack's actually knows what they are talking about huh... He combines a product called PEAK (peak monopotassium phosphate) that is high in Cal / Mag which is what my water type is void of. Your water type will dictate what type of Jack's professional fertilizer to use and in what PPMs so keep this in mind and cater your ferts and PPM to follow. This is his feeding schedule every time he waters with soil with a low initial nutrient charge like your Promix + perlite.
The PPM should also be changed for strains that are sensitive or heavy feeders to specific nutrients. Find what works for you. Best way to do that is to experiment.
Jack's 20-20-20 All Purpose PPM of NPK Stage of growth
----------------------------- ------------- -----------------
1.89g per gallon 100-63-107 Seedling to 12"-18" veg
2.26g per gallon 120-72-124 1 1/2' - 3' veg, early flower
2.64g per gallon 140-80-140 Mid to late flower
Jack's 10-30-20 Bloom PPM of NPK Stage of growth
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3.78g per gallon 100-150-190 Early budset til late flower
Jack's 13-2-13 w/ PEAK PPM of NPK Stage of growth
------------------------- ------------- -----------------
2.9g per gallon Jack's 100-50-136 Seedling to 12" - 18" veg
.7g PEAK
3.49g per gallon Jack's 120-68-174 1 1/2' - 3' veg, early flower
1.00g PEAK
4.07g per gallon Jack's 140-80-205 Mid to late flower
1.19g PEAK
Jack's 15-5-15 w/ PEAK PPM of NPK Stage of growth
------------------------- ------------- -----------------
2.52g per gallon Jack's 100-50-127 Seedling to 12"- 18" veg
.60g PEAK
3.02g per gallon Jack's 120-68-163 1 1/2' - 3' veg, early flower
.85g PEAK
3.53g per gallon Jack's 140-86-190 Mid to late flower
1.00g PEAK
The forum removed my formatting to make the would be rows match up horizontally with just spaces. Too lazy at the moment to make this a table. Hopefully it still makes sense. There are three rows fert name and value, PPM of NPK, and Stage of growth.
