Delphinium Requienii is a stunning heirloom flower that rises 36 to 60 inches tall, crowned with summer-to-fall blooms that attract pollinators and deer won't touch. Hardy in zone 7, this delphinium thrives in full sun with moderate water, making it a reliable choice for gardeners seeking vertical drama and continuous color from June through November. Its narrow footprint (12 to 24 inches wide) slots beautifully into borders and cottage gardens without demanding much ground space.
1
Full Sun
Moderate
7-7
60in H x 24in W
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High
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This heirloom delphinium flowers for an unusually extended season, blooming from early summer well into fall when many delphiniums have faded. Deer leave it untouched while pollinators flock to it, making it both a wildlife magnet and a low-maintenance perennial for zone 7 gardens. Its tall, slender growth habit and generous bloom window reward gardeners who want height and color without sprawl.
Delphinium Requienii is grown for its ornamental flowers, valued in cut arrangements and as a vertical accent in mixed borders. Its tall spires add height and structure to garden compositions, and its extended bloom season through fall makes it especially useful for gardeners seeking color depth into autumn.
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Start seeds indoors 8 to 10 weeks before planting out. Use a sterile germinating mix with vermiculite to prevent fungal problems, and keep the medium moist at temperatures around 65 to 70 degrees Fahrenheit. Darkness improves germination, so cover the seed tray until sprouts emerge in 10 to 30 days.
Harden off seedlings gradually before moving them to the garden after the last frost date. Transplant into soil that has been amended with 2 to 4 inches of compost worked in beforehand.
Direct sow in mid to late summer in zones 7 to 9 where the plant is hardy, allowing seeds to germinate before winter dormancy.
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