it depends on your growing medium.. if it's any type of hydro, then you want nutrients with every feeding, if it's soil, then not..
and be sure when you add this to your feeding regiment, that you don't push the EC too high over what your plants can handle.. (and if you're not sure what i mean, i suggest reading through this: https://www.mandalaseeds.com/Guides/Fertilizing-Smart-Guide )
happy growing