Mix potting soil with water until moist then make sure there are no clumps.
Loosely fill 4" inch pot with soil to the top of the pot. Make a spot for the seedling in the center of the soil about 1/2"- 1" deep.
Choose a seedling that has at least 1 set of true leaves.
Carefully uproot the seedling without breaking the roots.
Gently separate each plant from the others.
Gently separate soil from roots.
Insert seedling in the 4" pot by holding the leaves not the stem.
Cover the roots with soil- don't bury the stem too deep.
Keep the plants out of direct sunlight for at least 24 hours.