Multiple long, thin stems topped with clusters of 2" heads packed with tiny flowers. Blooms July to frost. Attracts bees and butterflies. Also known as purple top verbena, tall verbena, South American vervain, and purple-top verbena. Perennial in Zones 7-10 but can be grown as an annual. Ht. 36-48". Avg. 122,000 seeds/oz. Packet: 100 seeds.
DAYS TO GERMINATION: 14-28 days at 60-86°F (16-30°C). Alternating temperatures between 60°F (16°C) at night and 86°F (30°C) during the day helps to break dormancy.
SOWING: Transplant (recommended) — Sow 8-12 weeks before last frost. Cover seed lightly with growing medium. Seed is slow to germinate and sensitive to excess moisture, so keep growing medium on the dry side until emergence. Place seed trays on a heat mat during the day and remove at night to ensure the proper germination temperature. Transplant to cell packs or larger containers after true leaves appear. Harden off and transplant outside after the last frost. Direct seed — Direct seed only in areas with long growing seasons. Sow seeds after the last frost, barely covering seeds.
LIGHT PREFERENCE: Sun.
SOIL REQUIREMENTS: Almost any soil.
PLANT SPACING: 18-24".
HARDINESS ZONES: Zones 7-10.
HARVEST: Fresh: Harvest when the outer 2-4 layers of flowers are open.
USES: Fresh cut flower, borders, beds, containers, and mass plantings.
NOTES: May self-sow.
SCIENTIFIC NAME: Verbena bonariensis
ALTERNATE NAMES: Purple-top verbena, tall verbena, South American vervain