Verbena bonariensis is a heat-loving flower that brings airy elegance to gardens across zones 7 through 10. Growing 36 to 48 inches tall with a compact habit, this open-pollinated variety reaches flowering maturity around 90 days, making it a reliable performer from seed. Its slender stems topped with delicate purple flower clusters work beautifully in beds, borders, containers, and fresh arrangements, while attracting pollinators throughout the season.
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7-10
48in H x ?in W
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Moderate
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This tall, slender verbena produces delicate purple flowers on wiry stems that create an ethereal, almost transparent effect in the garden. It tolerates heat exceptionally well, thriving even when summer temperatures soar, and germinates reliably when given proper care. The flowers emerge continuously from early summer through frost, providing months of color with minimal fussing once established.
Verbena bonariensis shines in mass plantings where its airy texture creates a soft haze of color that softens hard edges and fills gaps between more substantial plants. The long, sturdy stems make it excellent for cutting, bringing that delicate purple tone into fresh arrangements. In containers, it spills gracefully over edges, and in pollinator gardens, it attracts bees and butterflies reliably throughout the growing season.
No timeline data available yet for this variety.
Sow seeds 8 to 12 weeks before your last spring frost. Scatter seeds over moist seed-starting mix and cover them very lightly, as they need some light to germinate. Keep the medium on the dry side because seeds are sensitive to excess moisture and may rot if overwatered. Germination is slow, so be patient. Provide warm temperatures around 70°F and maintain this drier, well-aerated environment until seedlings emerge.
Harden off seedlings gradually over 7 to 10 days by exposing them to outdoor conditions in increasing increments. Transplant outdoors only after the last frost date has passed and soil has warmed. Space plants 18 inches apart in full sun and well-draining soil.
Direct sowing is possible only in areas with long growing seasons. Sow seeds directly outdoors after the last frost date, barely covering them with soil. Keep the seed bed consistently moist but not waterlogged until seedlings establish.
Harvest verbena bonariensis flowers for fresh arrangements when the outer 2 to 4 layers of flowers in each cluster are fully open. This timing ensures the longest vase life and the most complete display of color. Cut stems in early morning when plants are fully hydrated.
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