Brazilian Vervain Verbena (Verbena bonariensis) is a towering herb that rises 3 to 4 feet tall, crowned with delicate clusters of purple flowers that seem to float on slender stems. Hardy in zones 7 through 11, this South American native thrives in full sun to partial shade and germinates readily in warm soil between 65 and 75°F. It's a garden workhorse that blooms generously and attracts pollinators with its airy, elegant form, a plant that adds vertical interest and movement to any planting scheme.
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7-11
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This verbena grows remarkably tall for an herb, reaching up to 4 feet, making it exceptional for creating height and structure in gardens without the bulk of woody shrubs. The flowers arrive in soft purple clusters held high on wiry stems, creating an almost ethereal quality as they sway in the breeze. It performs equally well in full sun or partial shade, adapting to various light conditions that would challenge other sun-hungry herbs. The germination window is straightforward: sow seeds in 65 to 75°F soil, and you'll have vigorous seedlings ready to transplant within weeks.
Brazilian Vervain Verbena is grown primarily as an ornamental herb, valued for its airy flowers and graceful vertical structure in borders, containers, and pollinator gardens. The delicate blooms are often used in fresh or dried arrangements, and the plant's height makes it a natural choice for the back of flower beds or as a subtle filler in mixed plantings.
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Start seeds indoors 10 to 12 weeks before your average last frost date. Sow in seed trays with moist, well-draining seed-starting mix and provide bottom heat to maintain soil temperature at 65 to 75°F. Keep soil consistently moist but not waterlogged. Seedlings typically emerge within 1 to 2 weeks and should be ready for transplanting into individual pots when they develop their first true leaves.
Transplant seedlings outdoors 10 to 12 weeks after indoor sowing, or after your last frost date has passed and soil has warmed. Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days before planting. Space plants 18 to 24 inches apart in full sun to partial shade locations. Water gently after transplanting and maintain consistent moisture for the first few weeks until plants are well established.
Sow seeds directly outdoors 2 to 4 weeks before your average last frost date, once soil temperature reaches 65 to 75°F. Choose a location with full sun to partial shade and prepare the bed with well-draining soil.
Deadhead spent flower clusters regularly to promote continuous blooming and maintain a neat appearance. As plants mature and reach full height, you can cut back stems by one-third in midsummer if they become leggy, which will encourage bushier growth and additional flowering. In frost-prone zones, cut plants back to within a few inches of the ground in late fall.
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