Soil question

Hi, i just did a transplant from miracle grow soil like 3 days ago into this organic mix. It seems to be killing my plants even though its pH is 7.0. the lower leaves are turned yellow and some of the fan leaves are dying. I cut off the dying leaves already and i really need to find a quick solution before its too late. Pics wouldn't really help since i cut all the bad leaves off(wasn't a lot ,just a few) so if someone could help me pick out the best soil from Canadian tire for growing that'd be great.

Canadian Tire
type in "soil" in quick search
thx

are you growing indoors or out?

I'm currently growing indoors, and for the remainder of my grow

Try giving it some B-1, it helps with transplant shock and stress.

still doesn't solve my soil problem however.