Garbage in, garbage out.
But I HIGHLY recommend doing at least a couple test runs of seedings, since that is the easiest step to fuck up, and see if you can get them to:
-germinate
-pop out root tips
-break dirt once they are planted
-not dry out, get the wilts, drown, or get burnt by soil nutes or lights
-not stretch because you underestimated the amount of light necessary to grow a healthy seedling
-bring them up to the magic 5 nodes where they are ready to be treated like real plants, and transplant them without killing them.