Ball's Improved Orange Calendula is a frost-hardy heirloom flower that brings vibrant deep orange blooms to gardens across hardiness zones 2 through 11. These cheerful 3-inch flowers arrive in a mix of single and double forms, reaching peak bloom in just 45 to 55 days from sowing. Beyond their ornamental appeal, the petals are edible and add both color and a subtle flavor to salads and other dishes, while their prolific self-seeding nature means they'll return year after year with minimal intervention.
Full Sun
Moderate
2-11
?in H x ?in W
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Moderate
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The real beauty of this cultivar lies in its dual purpose: stunning cut flowers that last in a vase alongside kitchen-garden utility as an edible garnish. The reliable 45-to-55-day bloom window means you'll have flowers all summer if you succession-sow, and the plant's exceptional frost tolerance lets you push the growing season far longer than tender annuals. Self-seeding calendulas have a way of surprising you with volunteer seedlings the following spring, turning a single planting into a multi-year garden feature.
Ball's Improved Orange Calendula shines as a cut flower, with sturdy stems and long-lasting blooms that hold up well in arrangements. The petals also serve as an edible garnish for salads and other dishes, adding both visual pop and a delicate flavor. Beyond the kitchen and vase, the flowers attract pollinators, making this variety a practical addition to any garden that needs bees and beneficial insects.
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Start seeds indoors 4 to 6 weeks before your last spring frost in a seed-starting mix. Seeds germinate best between 55 and 75 degrees Fahrenheit and will sprout within 7 to 14 days. Sow at a depth of 1/4 inch and keep the medium consistently moist but not waterlogged. Grow seedlings in bright light to prevent legginess.
Harden off seedlings over 7 to 10 days by gradually exposing them to outdoor conditions before transplanting. Move them outside once soil temperatures reach at least 55 degrees Fahrenheit and after the last frost date for your zone. Space transplants 10 inches apart in full sun. Calendula is frost-hardy, so transplanting can happen even in cool spring weather.
Direct sow seeds outdoors in spring after the last frost date, or in fall in warmer zones for winter and early spring bloom. Press seeds 1/4 inch into the soil and keep the seed bed consistently moist until germination, which takes 7 to 14 days. Thin seedlings to 10 inches apart once they develop their first true leaves.
Cut flowers for arrangements in the early morning after the dew has dried but before the heat of the day, when stems are most turgid. Snip stems just above a leaf node to encourage branching and more flowers. For edible petals, gently pluck individual petals from fully open flowers when they're at peak color; the petals will add the most visual impact and subtle flavor to salads and dishes when harvested at their brightest.
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