How to Grow Carnations
When planting carnations, remember that they prefer full sun to part shade. A minimum of 4-6 hours of sun is required for healthy blooms and foliage.
The soil should be well drained, fertile and tend toward a slightly alkaline pH level of 6.7-6.9. Do not plant these flowers in soil that is too richly fertile or too water absorbent.
If the soil is too rich you will end up with lots of green leaves and very few blooms.
Once established, a carnation can handle drought and take care not to water them too much. This could cause yellowing of the leaves, root rot and blossom drop. A light spray of water onto the plant 2-3 times a week should be sufficient to meet the watering needs unless the weather is extremely hot and dry.
Deadhead spent blossoms. Carnations are easy to deadhead with a finger pinch just beyond the junction of stem and flower. Always cut above or below one of the leaf nodes for maximum re-growth and flowering.