Verbena bonariensis Purple Top

Verbena bonariensis, commonly known as Purple Top Verbena or Tall Verbena, is a perennial plant known for its tall, slender stems and clusters of small, vivid purple flowers. Here's a guide on how to grow Verbena bonariensis 'Purple Top':

**1. Planting Location:**
- Choose a sunny location for planting, as Verbena bonariensis thrives in full sunlight. Well-drained soil is essential to prevent waterlogging.

**2. Planting Time:**
- Plant Verbena bonariensis seeds indoors 8-10 weeks before the last expected frost, or sow them directly in the garden after the danger of frost has passed.

**3. Planting Depth:**
- Sow the seeds on the surface of the soil, pressing them gently into the soil without covering them.

**4. Germination Temperature:**
- Verbena bonariensis seeds germinate best at temperatures around 70-75°F (21-24°C).

**5. Transplanting:**
- Transplant seedlings outdoors when they have several true leaves and the danger of frost has passed. Space them about 18-24 inches apart.

**6. Watering:**
- Keep the soil consistently moist during the germination period and until the plants are established. Once established, Verbena bonariensis is somewhat drought-tolerant, but regular watering is recommended for optimal growth and blooming.

**7. Soil Quality:**
- Verbena bonariensis prefers well-drained soil with a neutral to slightly acidic pH. Amending the soil with organic matter can enhance fertility.

**8. Mulching:**
- Apply a layer of mulch around the plants to help retain soil moisture, suppress weeds, and regulate soil temperature.

**9. Fertilization:**
- Use a balanced, all-purpose fertilizer during the growing season to promote healthy growth and abundant blooms.

**10. Deadheading:**
- Remove spent flowers regularly to encourage continuous blooming and prevent the plant from putting energy into seed production.

**11. Support:**
- Verbena bonariensis has tall, slender stems that may benefit from support. Consider staking or using other supports to prevent them from bending or breaking.

**12. Pests and Diseases:**
- Keep an eye out for pests such as aphids or spider mites. Treat any infestations promptly with insecticidal soap or neem oil. Verbena bonariensis is generally resistant to diseases, but good air circulation is essential.

**13. Blooming Period:**
- Enjoy the tall, airy clusters of vivid purple flowers from late spring to early fall. The flowers are attractive to butterflies and other pollinators.

**14. Overwintering:**
- Verbena bonariensis is often grown as a perennial, but it may not survive extremely cold winters. Consider mulching around the base of the plants in late fall to provide some protection.

By following these guidelines, you can successfully grow Verbena bonariensis 'Purple Top' in your garden, creating a striking display of tall, purple blooms and attracting pollinators to your outdoor space.