Oklahoma White Zinnia is a heirloom annual that produces exquisite white blooms ranging from semi-double to fully doubled flowers, each measuring around 2.5 inches across. These charming 'snowballs of the garden' emerge 63 to 84 days from seed and grow to a substantial 30 to 36 inches tall, creating impressive vertical interest in beds and borders. The plants thrive in full sun with moderate water, tolerate drought well once established, and bloom prolifically from summer through fall, attracting pollinators while remaining untouched by deer.
1
Full Sun
Moderate
3-10
36in H x 24in W
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High
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The white blooms graduate from semi-double to quadruple forms, creating an enchanting layered effect that deepens as the season progresses. Oklahoma White zinnias are surprisingly tough: they shrug off drought, resist browsing deer, and invite butterflies and bees into the garden without complaint. Deadheading these flowers triggers relentless branching and bloom production, turning a single plant into a long-season cut flower factory that keeps giving from June through November.
Oklahoma White Zinnia shines as a cut flower, with stems long enough and flowers substantial enough to anchor arrangements or stand alone in a vase. The extended bloom window from summer into fall makes it invaluable for continuous flower production in cutting gardens. Its architectural white blooms also work beautifully in cottage garden schemes and pollinator plantings where its nectar-rich flowers feed butterflies and native bees throughout the warm months.
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Sow seeds indoors 6 to 8 weeks before your last spring frost. Plant seeds at a depth of 1/4 inch in moist seed-starting mix and maintain temperatures between 70 and 80 degrees Fahrenheit. Seeds typically sprout within 4 to 6 days. Provide bright light once sprouted and harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days before transplanting.
Transplant seedlings outdoors after your last spring frost once soil has warmed and nighttime temperatures remain above 50 degrees Fahrenheit. Space plants 9 to 12 inches apart in full sun. Water gently at the base after planting and maintain consistent moisture for the first two weeks to establish roots.
Direct sow seeds outdoors after the last spring frost when soil is warm. Scatter seeds and press gently into soil at a depth of 1/4 inch, then keep soil consistently moist until seedling emergence, which occurs within 4 to 6 days.
Deadhead spent flowers regularly to encourage continuous blooming and promote fuller, bushier growth throughout the season. Removing the faded blooms redirects the plant's energy toward producing fresh flowers rather than setting seed.
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