Best way to get a good answere is to fill out the form.for starters what is the npk ration of the home depot soil and. What are its exact contents.with little info and pics to show the issues 9nly it looks like over fertilization.u shouldn't have any yellowing this early into flower. this is a human error.and easily fixable.flush now with p.h corrected water and lower your feeding schedule if it gets worse then up the food .