It's 16 simple nutrient elements plants want but I like using Canna flores as they add pH neutral Silica which no other Company adds to their base at least to my knowledge.
Jack's A (5-12-26), Calcium Nitrate, Epsom salt and some MKP (0-52-34) for weeks 2.5-6 in flower. I used to use GH Flora series for several years successfully, but got tired of over paying for a label and water.
