Check your local nursery for forget-me-not seedlings - many carry them. However, it's also a snap to start forget-me-not from seed.
Plant seedlings 8 to 12 inches apart in early spring.
Sow seeds in fall where winters are mild (seldom dipping below 10 degrees). Sow in early spring in colder climates.
Cover lightly with a quarter inch or so of soil.
Allow flower heads to ripen on the plant if you'd like them to self-seed. Otherwise, trim off spent blooms.
Cut back to ground or tear out in autumn.