Since this was my first grow, I have no other nutrient line to compare with. Cosmos F1 is an auto, so I followed the official nutrient guide for the All-Mix soil, but applied it to the Light-Mix substract. I believe I successfully avoided nutrient burn, even though she appears to have lacked nitrogen due to the light green colored leaves.
I must say that measuring liquid nutrients every watering is somewhat cumbersome, as it takes around 15-20 minutes to do so.