Put the seeds in the soil and then cover them with about a 1/4 inch layer of soil. Leave the cilantro growing until it is at least 2 inches tall. At this time, thin the cilantro to be about 3-4 inches apart. You want to be growing cilantro in crowded conditions because the leaves will shade the roots and help to keep the plant from bolting in hot weather.
If you are transplanting cilantro into your garden, dig holes 3-4 inches apart and place the plants in them. Water thoroughly after transplanting.