Well it's deff not a Cal mag problem man.. you need to list what you are using so people can help you. Lights. Heat Humidity Nutes ?
It was given to me like this. I havent personally started growing yet. Still got stuff in the mail coming. But got some info on it. It was grown in sun . (I threw it under a cfl light , The tempt right now is 76°f 61°humidity) .The plant came in/with viggoro all purpose potting mix with ecoscraps all purpose plant food mixed