It depends. I only feed foliar 3 types of lets say nutrients. Kelp, silica and fishmix. 1/5 to 1/3 of normal feeding amount. I would use normal like grow nutrients or calmag if some deficiencies would show up.
But with kelp, silica(i found it even better as foliar because normally its changing ph too much) and fish mix you cant go wrong during veg..