Select a planting site in the early fall or late spring. The site should have full sun and well draining soil.
Pull out the weeds in the planting site. Till the soil at a depth of 6 inches. Remove any stones and rake the soil so it has an even surface.
Scatter the cornflower seeds over the smooth soil. Rake 1/5-inch layer of soil over the seeds. Water until the soil settles. Continue watering frequently enough to keep the soil moist.
Wait two to four weeks for the cornflower to germinate.