you should try this solution and Test it and see how plant will respond to it for you. i need people who are willing to test this one. some minor changes are made.
Urea (7 gram)
calcium nitrate (10 gram)
Magnesium nitrate (10 gram)
CSM+B (15 gram)
MnSO4 (1 gram)
Ascorbic Acid (1g) (optional)
Potassium Sorbate (0.5g) (optional)
make sure to dose PO4 seperate 3x week 0.50ppm (around 0.16 P)
even though Ascorbic Acid and Potassium Sorbate are optional, i think Ascorbic acid help plant with better growth. add them in the solution before adding anything else and wait for 10 minutes before adding anything else.