Though I am new in this chili growing thing, from the 7 boxes of Epsom salt I have, it is obvious I use them often, initially for foliar spraying but now: direct to the soil and I saw good results: healthier plants than the earlier onesI had.
I mixed it in my gallon jug with my fertilizer. When I do fertilize I use epsom salts now as well. The stuff works VERY well IMO. Definitely a good thing to put in the water once in a while.