How do I grow a periwinkle blue Centaurea flower?
LocationPlant periwinkle blue Centaurea cyanus, commonly called cornflower or bachelor button, in the spring. Put them in a sunny or partially sunny location in a slightly alkaline soil. An area that gets afternoon shade is best in hotter regions. Mix a 1- to 2-inch layer of aged manure or compost into soil that is nutrient poor before planting.Planting and CareSpace Centaurea cyanus 12 inches apart and plant them at the same depth they were growing in their nursery containers. Water them generously right after planting and once per week afterward. They are drought tolerant and do not need much water. Let the soil dry out between waterings and let them stay dry until they perk up if the plants begin to get floppy. Give them a balanced fertilizer for flowering annuals once a month or mix a slow release fertilizer into the soil just before planting.
