Cultivation Sow seeds in spring or in autumn if the climate is mild. Plant in a sunny, sheltered site in shallow drills about 8 inches apart. When the seedlings are 3 inches high, thin to 6 inches apart. Seedlings do not transplant well. Companion planting Caraway and fennel hinder each other's growth and should not be planted together.
Caraway improves heavy soils by loosening the soil.
Propagation method Seeds or cuttings. Harvesting Harvest the grayish brown seeds when they are mature, about one month after flowering. Dry them on paper towel or plates in a shady area. Expose seeds to the sun, allowing them to completely dry out. Store in an airtight container when the seeds fall from the shriveled flower heads.