Begin with a large tray or pot filled with fresh potting soil. Plant the seeds about 2 inches apart, and cover them with ? inch of soil.
Place the pot where it gets at least half a day of direct sunlight, kept in a warm spot. Keep the potting soil moist by misting it each day. The seeds may take weeks to sprout, and will look like little blades of grass or small onion sprouts when they first come up.
Grow the daffodil plants until the bulblets underground start to grow big enough to almost touch, then dig them up and replant them in larger homes. Dig up and replant the bulbs each time they grow large enough. It will take two to five years before you see the first bloom from your seed-grown daffodils.