Carnation flower seeds can be directly sown into your flower garden or started indoors for transplanting later. If planting outdoors, sow the flower seeds in the spring after the frost season is over. For indoors, start the Carnation seeds 6 weeks before the end of the frost season.
When sowing Carnation flower seeds, cover them lightly with fine soil the thickness of the seeds. Space seeds or seedlings approximately 12 inches apart. Pinch out the growing tips on seedlings when the plants are 2 - 3 inches in height. This encourages bushy growth.
Carnation flowers are very easy to grow. They prefer full sun and rich, well-drained soil. Water them during dry periods, once or twice per week. Add a general-purpose fertilizer once or twice a month, but no more than that or you will get too much foliage.
Carnations have few problems with insects and disease. Deadhead spent Carnation flowers to prolong bloom time.