General epsom salt application is 1 tablespoon per gallon, for foliar feeding I dilute that about 4 to 1, I put 4 oz of the solution from the initial gallon and mix it with 28 oz of straight water. 2 tablespoons per gallon is too much and I'd advise flushing them very soon if not today as the salts will build up in the soil and possibly cause problems later on. I dilute all nutrients by about 50% of what is recommended, I fried 6 very nice plants 5 weeks into flowering once and that was like someone sucker punched me twice. It's not unusual for a few plants to show symptoms even if they are all in the same environment. I had a very nice budding plant develop a problem about a month into flowering that none of the other plants experienced and I was never really able to solve it.