Oklahoma Zinnia is a robust summer-to-fall bloomer that bridges the gap between early season color and autumn frosts, flowering reliably from seed to bloom in just 63 to 84 days. This cultivar of Zinnia elegans thrives across zones 2 through 11, making it one of the most cold-hardy zinnias available to northern gardeners. Growing to a tidy 30 to 36 inches tall with a spread of 18 to 24 inches, it fills garden beds with long-lasting color from June through November, while its proven deer resistance and drought tolerance mean you can plant it and largely let it flourish on its own.
1
Full Sun
Moderate
2-11
36in H x 24in W
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High
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Oklahoma Zinnia flowers from midsummer straight through the first hard frosts, delivering months of continuous blooms without fussing. Its cold hardiness to zone 2 sets it apart from many tender annuals, and it genuinely improves with regular watering yet survives dry spells when needed. Bees and butterflies flock to the flowers, making this an easy way to support pollinators while enjoying fresh-cut blooms that look radiant in arrangements.
Oklahoma Zinnia is grown primarily for its cut flowers, which are prized for summer and fall arrangements. The blooms appear continuously over a long season, making it reliable for gardeners who want steady bouquet material from their beds.
No timeline data available yet for this variety.
Sow seeds indoors 6 to 8 weeks before your last spring frost, pressing them just 1/16 to 1/4 inch deep into soil. Keep the seed tray at 70 to 80°F; germination will occur within 5 to 10 days. Cover seeds lightly but do not exclude light entirely. Transplant seedlings outdoors after hardening off once the danger of frost has passed.
Transplant hardened seedlings outdoors after the last spring frost when soil has warmed. Space plants 1 inch apart in their final locations.
Direct sowing is recommended. Sow seeds outdoors after the last spring frost, pressing them 1/16 to 1/4 inch into soil. Water gently to keep the seedbed moist until seedlings emerge.
For fresh-cut flowers, harvest in the morning when blooms are at their freshest and petals are just opening. Cut stems with a clean knife that has been dipped in a 10% household bleach solution. Place cut flowers in a vase with a few drops of bleach to extend their display life.
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