Florist Blue Boy Centaurea is a classic cornflower variety prized for its striking deep blue blooms and reliable performance across hardiness zones 2-11. This open-pollinated cultivar reaches maturity in 65-75 days, producing cut flowers of exceptional quality that stand out in fresh arrangements. With a compact bush habit and minimal spacing requirements, it's an efficient grower that rewards both novice and experienced gardeners with abundant, dependable color.
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2-11
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Moderate
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Deep blue flowers emerge on sturdy stems ideal for cutting, and this variety germinates reliably between 60-70°F with quick establishment from seed. The compact growth habit means you can fit more plants in less space, while the frost-hardy nature lets you sow as soon as soil can be worked in spring. Bees and beneficial insects gravitate to these blooms, adding pollinator activity alongside visual appeal.
Florist Blue Boy thrives as a cut flower, delivering the deep blue tones florists and home arrangers seek. Its nectar-rich blooms make it an excellent attractant for bees and other beneficial insects, supporting pollinator populations in the garden. Though not edible, the flowers themselves have traditional ornamental value in classic garden arrangements.
No timeline data available yet for this variety.
Sow seeds 3-4 weeks before your intended planting-out date. Sow into cell packs or larger containers, and when the first true leaves appear, grow seedlings at 50-55°F during the night for several weeks to develop a strong root system before transplanting outdoors.
Harden off transplants gradually before moving them to the garden. Plant outdoors after the last frost date in your region, spacing plants 6-9 inches apart.
Direct seed as soon as soil can be worked in spring. Sow seeds thinly in rows at a rate of 6 seeds per foot, planting 1/4 inch deep. Cover lightly and keep the soil surface moist until emergence. When seedlings develop their first true leaves, thin to 6-9 inches apart.
Cut flowers when they are 1/4 to 1/2 open for longest vase life and optimal appearance in arrangements. Harvest in the morning after dew dries, using sharp scissors or pruners to avoid crushing stems. Regular cutting encourages more blooms throughout the growing season.
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