when I went back to organic soil I used bio bizz and GO's line. the buds that I won the cup with were grown with the complete GO line in my amended soil.
I would try topdressing with worm castings guano's and watering with ACT if the bottled nutes are too pricey for you.
last year my outdoor was swamp soil amended lightly with one top dress about halfway into flower when they started yellowing early.
now I'm using all the organic goodies that I was too scared to get delivered to my place in NY.
Amazon has these pick up lockers in the mall here that are awesome and keep the neighbors from peeping on your deliveries.
the frost and smell is off the charts on this indoor now and I'm only using 600's for lights.