Answer: Annual carnation (Dianthus) seeds should be sown just on the surface of moistened seed starting mix and barely covered with additional soil. The seeds will germinate in 5-21 days when kept at 60F-70F degrees. The plants grow best in full sun, in rich, moist, well-draining soil. You can sow the seeds directly outdoors in the very early spring, for bloom during the coolest months of spring. Dianthus flowers best in cool weather.
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