10+
Blue vervain is a herbaceous perennial known for its upright growth and slender, branching stems. It produces narrow flower spikes with small blooms during the growing season. This plant grows well in temperate climates and performs best in full sun to partial shade with moist, well-drained soil. Blue vervain establishes steadily and is suitable for garden beds, borders, and naturalized planting, where it maintains consistent seasonal growth.
Features
- Upright perennial with slender, branching stems
- Produces narrow flower spikes with small blooms
- Suitable for temperate growing conditions
- Adaptable to garden beds, borders, and naturalized areas
- Prefers moist soil with steady seasonal growth
Specifications
- Scientific name: Verbena hastata
- Common name (US): Blue Vervain
- Seed type / variety: Open-pollinated
- Growth habit: Upright, herbaceous perennial
- USDA zones: 3–9
- Planting season: Spring and fall
- Growing season: Summer to fall
- Sowing Season: February to April, September to October
- Germination time and conditions: 14–28 days at 18–22°C
- Sunlight requirements: Full sun to partial shade
- Soil requirements: Moist, well-drained soil
- Watering needs: Moderate to high, prefers consistent moisture
- Mature plant size: 90–150 cm height, 30–60 cm spread
- Plant spacing: 30–45 cm between plants
