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I've been eyeing off the Peter's excel for a while. Got some 13-5-20 coming in soon. Looks the goods.Cannabis only need the 12 base nutrients, like all other plants.
90% of what's advertised in the cannabis industry is a hoax.
So any quality fertilizer with all 12 with the approximate ratio will suffice. Don't get too hung up on it.
Look into Peter's Excel nutrients, does all what is needed at ¢/litre in both veg and bloom formulations. One 15kg bag is at least 15k litres of nutrients.
As per Dr Bruce Bugbee who recommends Peters Excel or Jacks:
To your substrate if not rockwool, add 40g ft³ of dolomite lime for calcium & magnesium and 10g ft³ of gypsum for sulphur. Up to 50% vermiculite for silica and it's other good growth properties.
600ppm all day long and you've got a winner.