Yes it does. But it also is high in N and low in P according to most of the scientific studies I have read. Here is 1 that I thought was good.
https://www.cannabisbusinesstimes.com/article/balancing-the-nutrient-equation-cannabis-cultivation/
I have been running all kinds of different numbers through
@Renfro calculator trying to get to the 1-1-2-1-.5 By using a cal-mag supplement it allows you to make different ratios. The consensus on PPM values of GH trio N-P-K-Ca-Mg values is 100-100-200-100-50. Correct?
Jack's @ full strength, 3.6-2.4-1.1 g/gal with no other additives comes in @ 146-50-205-120-89. By using just the 3 parts of Jack's alone it seems impossible to reach the 100-100-200-100-50 mark.
By mixing the 3 parts at different amounts and adding additives(mkp,K2O, K2SO4) at different amounts to reach that benchmark. The only way to get close to those numbers with Jack's you have to remove a bunch of part "A". When you do that you are also removing alot of micro nutrients along with it, so my 1st thought was add 10-15 gallons tap water, to get some extra micros in the mix, then finish filling 50 gal res with ro water. I believe
@TintEastwood has been working on the same numbers. I would like to get some of his input also. But
@rkymtnman your input is always welcome. Input from all sides is good.