I wrote last week about Cal-Mag plant nutrients but from another company called Nectar of the Gods. I was talking to the rep for General Hydroponics and they indicated that Botanicare Cal-Mag uses a 100ppm of nitrogen- more than CaliMagic which is a GH Cal-Mag. With that said if you are vegging your plants it’s probably better to use the Botanicare Cal-Mag during that stage and the GH-Cal-Mag version during the flowering.