sulphur deficiency

I am just wondering how do I raise the sulphur in my soil because some of my stems are turning purple and the bottom leaves are turning yellow and turning crispy. I've read from this guide http://www.drugs-forum.com/growfaq/97.htm that someone else posted that this is my problem....Thanks for the help

I've also used 24-8-16 miracle grow. So it is getting some phosphorus. I wonder if 8 % is not enough?

I am having the same problem and I opted to use epsom salt for the sulphur it will add magnesium as well 2 crucial trace elements so far they are responding well I used a weak dose of 1 tsp per gallon and did not saturate the soil only moistened it to ensure that was the culprit (ie dont over feed them something they dont need) check your ph and make sure you dont have a nute lock out 6.25-6.75 is ideal soil ph