I do not know, but it seems it would relate to what other nutrients you're using, and whether any of those needs are being met by that fertilizer.
I use a potting mix without a pre-charge of nutrients and do not add epsom salts or lime at any time. All nutrients are supplied by a three part water soluble mix of fertilizer/mag/cal in the daily watering.
fabric pots/ promixHP/ chem-gro tomato + cal,mag
|