Fill the flower pot with planting soil. Press it down firmly with your hands. Leave around one inch between the top of the soil and the top of the flower pot rim. Add or remove soil as necessary.
Press forget-me-not seeds into the soil, about one-eighth inch deep. Plant the seeds approximately four inches apart. Continue around the surface of the soil until you've planted a circle of seeds.
Water the seeds immediately. Keep the soil moist but not soaking wet by watering lightly and frequently. Place the flower pot in a partially shaded area on your patio or porch.
Thin the seedlings after they are about three inches tall. Pull out all but the most vigorous. Generally, two to three plants per gallon pot allows enough room for the roots to thrive.
Give the potted plants a dose of liquid fertilizer after the seedlings are established, approximately two months after sprouting.