Verbena - Purple Top

Product Information

Seed Count: ~50 seeds
Botanical Name: Verbena bonariensis
Plant Type: Tender perennial (grown as annual in cooler climates)
Plant Height: 90–120 cm (36–48 inches)
Sun Exposure: Full sun
Hardiness: Zones 7–10
Pollination: Open-pollinated

Verbena Bonariensis Seeds for Pollinator-Friendly Gardens

Verbena bonariensis is a tall, airy flowering plant known for its delicate appearance and exceptional heat tolerance. Grown from verbena bonariensis seeds, this species produces slender stems topped with clusters of small purple flowers that bloom continuously from mid-summer until frost. Its see-through habit creates a light, vertical silhouette that weaves beautifully through borders and mixed plantings without overpowering neighbouring plants. As a trusted Canadian seed shop, quality is always our top priority. Explore our seed collections to find carefully selected varieties suited to your growing space.

A Scientific Look at Verbena Bonariensis Growth Habit

Botanically classified as Verbena bonariensis, this species is native to South America and adapted to warm climates, well-drained soils, and full sun exposure. The plant develops a deep root system once established, contributing to its drought tolerance and long flowering period. Despite its delicate look, the stems are strong and self-supporting, making staking unnecessary in most garden settings. Verbena bonariensis is highly attractive to bees and butterflies due to its accessible nectar and extended bloom window.

Growing Details

Bloom Time: July to frost
Germination: 14–28 days
Seed Depth: Surface sow or barely cover
Starting Method (Recommended): Start indoors 12 weeks before last frost
Cold Stratification: Required for best germination
Outdoor Sowing: Suitable only in warmer climates after last frost

Germination & Stratification Instructions

To improve germination rates of verbena bonariensis seeds, cold stratification is recommended. Wrap seeds in a moist paper towel, place inside a plastic bag, and refrigerate for 7 days before sowing. After stratification, press seeds into soil and barely cover. Keep soil slightly moist, as excess moisture can reduce germination success. Maintain warmth and darkness until sprouting. A heat mat may be used during daytime hours only.

FAQs

Is Verbena bonariensis an annual or perennial?

Verbena bonariensis is a tender perennial in warm climates (zones 7–10) but is commonly grown as an annual in cooler regions.

Does Verbena bonariensis attract pollinators?

Yes, verbena bonariensis is highly attractive to bees and butterflies and is considered one of the best pollinator plants for late-season nectar.

Why do Verbena bonariensis seeds need cold stratification?

Cold stratification mimics natural winter conditions and helps break seed dormancy, significantly improving germination rates.

Does Verbena bonariensis require staking?

No, despite its height, the plant has strong, wiry stems and typically does not require staking.