When I started 15 years ago I used MG soil & didn't have 1 bit of problems!! I don't use it now, I mix my own! But I wouldn't use the " orchid" type, if MG is your only selection! Use the reg MG potting soil, if your going to. It will not hurnt your plants, according to others! Not saying I recommended it or anything by far! Just saying it won't hurt them! With that said, change those babies outta the orchid soil, and go with else. If it already has nutrients in it, don't add/feed nutrients until they run out, or you start to see 1st signs of deficiency. When you transplant, be carefull not to damage the root ball. I dose mine after replanting with a low mixture of vitamin B-2 & superthrive! They won't go through a bad shock if doesed with this mixture. Hope that helps you bro.. Dank.