I have been trying to wrap my head around NPK ratios so I created a spreadsheet to help me sort it out. I do realize there are a lot of variables which makes straight forward math tough but how far do you think this is off?
I started with the recommended dosage and calculate the actual volume of NPK as a percentage:
By adjusting the dosage percentage I can change the final NPK ratio:
So in this case I was shooting for 2-3-4. I am 4 weeks into an 8 week flower using soil. I starved them a lil for nitrogen hence the 2 ratio. The final EC of my feed came out to 2.1.
Like I said earlier, on stuff like this 2+2 doesn’t always equal 4.
I would appreciate your thoughts.