Originally Posted by eric2028
Per jacks rep: oasis/ jacks 16-4-17 and jacks cal-mag is a 2 part recipe that’s works best with peat/promix. And from my personal experience it works great!
Jacks 321 is made to work with hydro or coco.
It does great although I’ve found some strains need alittle tweaking at least in veg.
Never tried on veggies sorry
I was unable to find the label of the 16-4-17
Jacks 5-12-26 has very high levels of magnesium and sulfur.... this has led some to speculate it has been made for cannabis...
most people who use 5-12-26 can avoid the use of epsoms...... magnesium and sulfer
with 16-4-17 thats always an option
However the npk sounds more like something I would give to lettuce...not a flower plant of any sort