Castle Series Celosia brings vibrant, densely packed flower spires to gardens across zones 3 through 11, delivering reliable color from summer through fall. These plumed celosias reach 8 to 12 inches tall and mature in 70 to 79 days, making them fast enough for even short growing seasons. The sophisticated, bright spikes work beautifully in containers, borders, and mass plantings, offering the kind of bold, upright structure that transforms a flower bed without fuss.
Full Sun
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3-11
12in H x ?in W
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High
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The densely packed, vibrantly colored spires are the real draw here, standing upright and reaching full maturity in just 70 to 79 days. These plants perform as high performers throughout the summer, thriving in full sun with straightforward care. At 8 to 12 inches tall, they slip easily into containers or front-of-border positions where their bright flower spikes create immediate visual impact.
Castle Series Celosia shines as a cut flower for fresh arrangements and as a landscape accent where you need reliable summer color. The tall, columnar flower spikes work well in containers on patios and decks, or massed in borders where their upright habit creates a structured, architectural effect. They're equally at home in cutting gardens and mixed containers.
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Start seeds indoors 6 to 8 weeks before your last spring frost date. Plant seeds shallowly on moist seed starting mix, keeping soil temperatures around 70 to 75 degrees Fahrenheit until germination. Transplant seedlings to larger containers once they develop their first true leaves.
Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days. Transplant outdoors after all danger of frost has passed and soil has warmed. Space plants 12 inches apart in both directions in beds prepared with well-draining soil.
Direct sow seeds into warm soil after all frost danger has passed and soil temperature reaches at least 70 degrees Fahrenheit. Sow seeds shallowly on the soil surface and keep evenly moist until seedlings emerge.
Deadhead spent flower spikes regularly to encourage continued blooming and maintain a neat, compact appearance. This will extend the flowering season throughout summer and into early fall.
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