If you're having trouble in soil know Coco is even more difficult in my opinion, and someone else said that above too
You didn't really talk about you soil, you said it was some potting soil, is it Miracle Grow? did you add any perlite to it? it's too wet to begin with,
also your pH is all over the place, any reason why?
What PPM are you feeding Flora Trio at, what ratio, and how often?
Anyway my recommendation is to:
1) learn how to properly water a plant
2) keep your pH consistent at 6.5
3) start feeding nutes at an appropriate strength
Good luck