Centaurea cyanus. A mix of purple, blue, pink, and white papery blossoms bring summer colour to the garden. Try planting some Tall Mixed Cornflowers in a big clump at the edge of the yard for stunning summer colour. They are an excellent cut flower and they dry well, looking fresh for ages. Cornflowers are highly attractive to pollinators and beneficial insects like Syrphid flies. The flowers are edible, and the plants are drought resistant for xeriscaping. Deadhead spent flowers to prolong the bloom period, and to keep plants looking tidy. Tall Mixed Cornflowers seeds are easy to save from year to year.
How to Grow Centaurea
An annual plant that also answers to Cornflower, Bachelor’s Button, Bluebottle, Hurtsickle, Hardheads, Knapweed, and Star Thistle. We use the genus name to keep it nice and simple. Grows well in any ordinary, well drained garden soil. Seeds will flourish within the pH range of 5.5-7.0. Deadhead regularly to prolong blooming. You will find planting several times over the spring will produce a longer bloom time throughout summer and early fall.
Season & Zone
Exposure: Full sun
Direct sow starting just before last frost, and again every two weeks until end of May. Can be direct sown in autumn as well. Starting indoors is not necessary, but can be accomplished by keeping seed trays in the dark at the optimal soil temperature of 15-21°C (60-70°F). Move under bright lights once germination occurs, and transplant out in late spring, around mid-May.
Just cover the small seeds. Thin or space to 15-30cm (6-12″) apart.
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