Cornflower

A cute little annual with the cutest blue flowers.
Common name : Cornflower
Scientific name : Centaurea cyanus
Family : Asteraceae
Category : Annual
Rough 'n tough
Rough 'n tough
Flowery
Flowery
Centaurea cyanus - cornflower or bachelor's button - is an annual flowering plant in the family Asteraceae native to Europe. It was often found as a weed in cornfields, hence the name, but is now endangered in its native habitat by agricultural intensification, particularly over-use of herbicides. It is however now naturalized outside of Europe through introduction as an ornamental plant in gardens.

Sowing & planting

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Flowering

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F
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Caracteristics

Exposition
Water needs
Granulométrie plants.granulometry_4
Frost-resistance High
Zone USDA 7a
Height 20 - 80
pH 6 - 7

Identify my cornflower

The blueberry is an annual Asteraceae with leaves of 10 to 20 cm, whole, woolly, oblong, and it bears from May to July flowers of 2 to 4 cm with dark blue ligules. The plant reaches 80 cm in good conditions.

Sow my cornflower

Blueberries do not like to be uprooted so it is advisable to sow at the final location - or use biodegradable pots. When heavy frosts are over - usually in April - sow in full sun, in cool, moderately rich, well-drained soil. Prepare the seedling with a light digging, then scratch and rake the surface. Arrange the seeds regularly - mix them with sand for easy handling - then rake again to bury it slightly. Water in fine rain. Do the same in pot, seed in a mix of loam, sand and sifted compost or potting soil. Choose a container at least 15-20 cm deep, blueberry plants can grow big.

Water my cornflower

Cornflower require medium watering. In pots, water at least once a week, if you see the earth is dry on the top of the soil. In open soil, watering is not necessary after the first month, except during intense drought.

Remove my cornflower

Cornflower is an annual plant, so at the end of the season, collect the seeds on the dry stems. Then tear stems and roots, then compost it all. Keep your seeds dry and protected from light until next year.

Prune my cornflower

Vigilant deadheading once or twice a week will prolong the blooming period ! Let a few bloom fully for seeds if you want.

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