Blood meal is bad Mkay!!!! I quit using it last year!
Maybe try full organic and ditch the coco.... I can plant directly in my soil mix without waiting and do not have any issues. When I was using Blood meal I had marginal yellowing and tip burn. I also do not use EWC... Haven't for almost a year now.
I also figured out that Molasses will cause issues during flowering so I have discontinued the use of it if there is a plant in the tub. I do however use it in a tea to keep my waiting tubs moist but never ever water a plant with it!!! I use clear water every time!
Another thing with organics is you need big containers! I prefer 18 gallon tubs but also use some 3.8 gallon pots. A 4 foot plant in a 3.8 will not be happy all the way to finish!