MAF,
Welcome to our world of growing here @ ILGM and to our outstanding community.
I to use MG Potting soil. But the only mg i’ll use is the potting soil with a
N.P.K of >>.
N= 0.06
P= 0.08.
K= 0.07
But other MG is way to hot.
But go get some Worm Castings and some Perlite and add them to your mix. The seedlings will love you for it