Carnations (Dianthus spp.) are perennial herbs with colorful, fragrant blooms. Of its several cultivars, one in particular is especially suitable for indoor container growing. Pot carnations (Dianthus caryophyllus) grow well in indoor conditions and prefer temperatures between 60 and 70 degrees Fahrenheit, well-draining potting soil, bright light and good air circulation. The flowers are typically 10 to 12 inches tall, while the heads are about 1 inch in diameter. Carnations grow in U.S. Department of Agriculture plant hardiness zones 4 through 10.
Place carnations in a sunny, south-facing window.
Water the soil about once a week, allowing it to almost dry out between waterings. Avoid wetting the foliage or flowers.
Fertilize carnations every two weeks with 10-10-10 fertilizer diluted to half-strength.
Deadhead spent flowers as they wilt. When the plants quit blooming, cut the stems back halfway.
Kill aphids or spider mites by spraying the carnations thoroughly with insecticidal soap once a week. Stop using it when the pests are gone.
Things You Will Need
- 10-10-10 water-soluble fertilizer
- Pruning shears or scissors
- Insecticidal soap
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