I love the title! Betcha it won't get as much attention as if you had posted "Humboldt, the secret to success!" ...or the Bushmaster thingie. Notice how quiet it got when I revealed the truth about this product and the risks involved? Hah!
You could sit here and spends hours trying to consolidate, collect the thousands of posts regarding nutrition, errrrr, I mean vendor fertilizer and supplement products. Anyhow, here's a few links folks should memorize if they want to grow fine plants.
What is plant nutrition?
Nutrient excesses and deficiencies
The concept of nutrient antagonism
I can hear it now - "but is isn't pot!"
Well...... then go buy your snake oils, follow your charts, and rots of ruck.