Gourmet Lettuce

Well I planted some gourmet lettuce three weeks ago in some potting soil and yesterday I transplanted them in a larger container in my garden room in a potting soil/worm casting mix.  I just was not happy about the outcome with potting soil alone.  Now I want to see what the castings will help do.  So now in two weeks I will take a new picture so we can see if the castings have made a difference.