Orange-flesh Watermelon
Orange King Calendula is a stunning heirloom variety of Calendula officinalis that produces massive, fully double flowers in a brilliant shade of orange that justifies its regal name. Hardy across zones 2 through 11, this self-seeding annual reaches 18 to 24 inches tall and flowers in just 65 days, making it both reliable and rewarding for gardeners seeking vibrant color. The flowers are substantial and showy, with petals that layer generously to create a luxurious bloom.
Full Sun
High
2-11
24in H x ?in W
Annual
High
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The flowers on Orange King are genuinely massive and fully double, their brilliant orange petals arranged in dense, layered formations that catch the eye from across the garden. At 18 to 24 inches tall with a 10-inch spacing requirement, this variety fits neatly into beds and borders without overwhelming neighboring plants. It self-seeds readily once established, returning year after year with minimal intervention, and blooms reliably within 65 days of sowing.
Orange King Calendula is primarily grown as a cut flower, prized for its large, showy blooms and long vase life. The flowers are harvested in the morning when petals are just opening, then conditioned with bleach solution to extend their ornamental display. Gardeners also cultivate it for continuous color in flower beds and borders throughout the growing season.
Sow seeds indoors on sterile seedling mix and cover lightly. Germination occurs between 70 and 85 degrees Fahrenheit, typically within 6 to 15 days. Start seeds 4 to 6 weeks before your last frost date to have established transplants ready when outdoor conditions warm.
Transplant outdoors after the last frost date when soil has warmed to at least 65 degrees Fahrenheit. Space plants 10 inches apart in full sun. Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days before transplanting.
Direct sow seeds outdoors after the last frost date and soil has warmed. Seeds sprout in 7 to 14 days under proper conditions. In mild climates, you can also sow in fall for winter and early spring blooms.
For cut flowers, harvest in the morning when blooms are at their freshest and petals are just opening. Cut with a clean knife that has been dipped in a 10% bleach solution to prevent disease transfer. Place cut stems immediately in water with a few drops of bleach added to the vase to prolong their beauty and vase life.
Deadhead spent flowers regularly by cutting with a clean knife dipped in a 10% bleach solution to encourage continuous blooming and maintain a compact, bushy shape. This practice extends the flowering period throughout the season.
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