5 Cornflower Care Tips

The cornflower is a genus of plants that grow as annuals, biennials and perennials. These plants have a variable growing season and typically are seen between the late spring to late summer. Also referred to as the Centaurea, there are some care instructions that you need follow. These care tips include knowing how to plant, water, mulch, fertilize and weed your cornflower plants.

The plant is also known as the Bachelor's Buttons. It has lavender blue flowers and its leaves are narrow, gray-green, and with a lance shape. The cornflower grows from 10 inches to 2-1/2 feet in length. In addition to being used in flower arrangements, the cornflower can also be an additive in herbal teas.


Planting cornflowers should be done 6 to 7 weeks before they are placed in your garden. You should plant the cornflowers indoors first to allow the seeds to properly germinate, and transfer the flower to the outdoors in the late spring. The soil that you plant the seeds in should have a pH balance of 5.5 to 7 for the best growing results. The seeds can be sown successfully from the first frost of spring to late autumn, and kept indoors to be used to make additional cornflower plants.

When transferring the cornflower plants outside, plant them in an area that has plenty of sunlight exposure. The sun is needed by this plant to promote growth. Placing it in areas of your garden that are devoid of light is like granting it a death sentence.


The cornflower needs to be watered on a regular and constant basis. If you are in a particularly arid community, or one that is subject to daily or weekly watering restrictions, use rain barrels and other devices to save and store water. This will ensure your access to the water that the cornflower plant needs.


Use mulch as a way to retain water for the cornflower. This is especially important if you grow your sunflower plant in an area that lacks water. The mulch can provide you with a way to conserve water needed by the sunflower without having to go through extraordinary means to obtain or acquire water for the plant's use. Use a mulch that adds nutrients to the soil and does not deplete the soil's richness needed by the cornflower plant.


Provide fertilizer for your cornflower plan in the early spring when first planting and transferring the cornflower plant to the sunny outdoors. The fertilizer should match the pH balance of the soil and not provide less nutrients than what is needed by the cornflower to grow and thrive.


Keep the garden area clean and devoid of any weeds and choking plants that may deprive the cornflower of water or access to sunlight. If this happens, the cornflower plant will eventually stop growing and will not produce seeds.