General
Like the standard and spray carnation, the pot carnation belongs to the genus Dianthus of the family Caryophillaceae. Under normal growing conditions, the Sunflor pot carnation remains sufficiently compact. Treatment with growth regulators is unnecessary. Even so, we sometimes find growth regulators being sprayed in practice. The result is then a more compact plant. A disadvantage can be an extended period of growth. The pot carnation will tolerate temperatures as low as 14ºF, making them a great early spring item in the garden center. The use of watering mat or soil sheet helps to distribute the water better and restricts rooting through.To ensure good branching and growth, plants should be pinched as soon as the main bud appears. Spacing. It is recommended that the crop be started pot tight and spaced to 7 to 8 plants per square foot once the plants start to "touch" once another.
Fertilization and Irrigation
Carnations prefer a high phosphorus feed program initially. The plants can be fertilized with concentrations of 150 to 200 ppmN. ECs should be maintained below 2.0 millimhos.Carnations require constant moisture levels for best results. Subirrigation is the preferred method of irrigation, keeping the foliage dry and not damaging the flower heads. Excess moisture will result in a stretched plant habit.Plant growth regulators are not recommended on these varieties.
Temperatures and Lighting
To obtain the best quality, it is recommended that these carnations be grown at a day temperature ranging from 50 - 59°F and a night temperature of 41- 46°F. Supplemental carbon dioxide at the rate of 1,000 ppm will improve plant quality and produce earlier flowering.The production and development of flower buds are improved under long-day conditions. Extended daylight at the level of 10w/m2 for at least two weeks after pinching. The extended day length will increase plant size.