The time it takes forget-me-nots to germinate depends on whether the seeds have been stored or you are planting fresh seed. Properly stored seeds -- stored dry at 70 degrees Fahrenheit -- germinate within 3 to 5 days at 70 degrees. Fresh seed germinates at 40 degrees within 2 days to 1 month. Or, for earlier blooms, start them indoors a few weeks before the last frost in your area. Sow seeds after all danger of frost. Cover lightly with 1/8" of garden soil. Space them 4-5 inches apart and thin seedlings to 10" apart.