Classic Magic Centaurea is a charming open-pollinated cornflower that brings rich, vibrant color to gardens across hardiness zones 2-11. This bush-form cultivar flowers in 65-75 days, rewarding quick growers with blooms perfect for cutting or attracting beneficial insects to the garden. Hardy to frost and easy to direct sow as soon as soil workable, it thrives in neutral to slightly acidic soil (pH 6.0-7.5) and asks for little fuss once established.
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2-11
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Moderate
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The dense, bushy growth habit combined with a striking color combination makes this cornflower stand out in the cutting garden. Seeds germinate reliably in cool soil (60-70°F) and develop into sturdy plants that need only 2 inches of spacing, allowing you to pack plenty of blooms into tight garden beds. Direct seeding produces flowering plants in under 11 weeks, making it one of the fastest routes to a succession of fresh cut flowers.
Classic Magic Centaurea serves dual purposes in the garden. The flowers excel as cut blooms, lasting well in the vase when harvested at the right stage. Beyond the home bouquet, this cornflower acts as a magnet for beneficial insects, drawing pollinators and predatory wasps that help manage garden pests. While technically edible, it is grown primarily for its ornamental beauty rather than culinary application.
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Sow seeds 3-4 weeks before your planned transplant date in cell packs or larger containers. Keep seedlings at cool nighttime temperatures between 50-55°F (10-12°C) for several weeks to develop a strong root ball; this cool period is critical for quality transplants.
Harden off seedlings gradually before moving them to the garden after the last frost date. Space transplants 6-9 inches apart in full sun. These frost-hardy plants can tolerate cool soil conditions at planting time.
Sow seeds thinly in rows at a rate of 6 seeds per foot, pressing them lightly into soil 1/4 inch deep. Sow as soon as soil can be worked in spring. Cover lightly and keep the soil surface moist until seedlings emerge. Thin seedlings to 6-9 inches apart when they develop their first true leaves.
For cut flowers, harvest when blooms are 1/4 to 1/2 open, cutting stems early in the morning for longest vase life. At this stage the flowers are fresher and will continue opening indoors, extending their display.
Deadhead spent flowers regularly to encourage continuous blooming throughout the season. The compact bush growth habit requires minimal structural pruning.
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