I was, until today, mixing a 4 Gallon VEG formula of a maximum concentration of 2.5 ml/L Floranova Grow 7-4-10 and 2 ml/L of Thrive-Alive B-1 1-1-1.
Honestly I think I could have made it a bit stronger, regardless, I'm switching to organic Grotek Blooming Essentials 0-1-4. How can I use the 2...