its not a good idea to use soil with fert already it in. you should start out with nutrual soil. plus the ferts might burn them lil babiez
same thing I was thinking...
I grow only with MG and Ive been burned plently of times by it bcuz of my lack of knowledge on how to use it properly.
FY666, If you can, replant those seedlings into rockwell cubes, jiffy cubes, or another soil mix that doesnt contain any nutes. When they are about 2 weeks old, transplant them into the miracle grow soil and water thoroughly...you should be good to go from there. The soil will feed the plants for about 2 months depending on how U water (too much water will flush the nutes, too little water will dehydrate the plants) I'd water every 4 days exactly to be safe
about the nutes - With the MG you'd be best off getting something that is high in Nitrogen for vegetative growing and something higher in Potassium and Phosphorus for flowering. MG makes a really good fertilizer for both vegging (24-8-16) and bloom (15-30-15) that you can either spray onto the plant, or feed thru the soil and it wont burn the plants if u use it according to directions... both are under $4 each and you get a huge box of it, you wont run out for 3 or 4 more grows!
In addition to any fertilizer I would strongly recommend molasses, simply bcuz it is a tried and true home remedy thats proven to encourage growth in both stages of growth.