Pour 3 to 4 inches of composted manure onto the flower bed. Use a garden fork to mix it with the existing soil.
Lay the seeds on the surface of the soil, and cover them with a 1/8-inch layer of sand.
Mist the bed to moisten the sand layer and the seeds beneath. Keep the bed moist until the seeds germinate, which should occur within three weeks.
Thin the love-in-a-mist seedlings to 8 inches apart when they have their third set of leaves.
Plant more seeds every month to have blooms all season.
Pinch off dead flowers to encourage the plant to produce more. If you would rather have the seed pods, allow the dead flowers to remain on the plant.