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Delphinium is a herbaceous flowering plant known for its upright growth and tall, dense flower spikes. It produces layered blooms along sturdy stems during the growing season. This plant grows well in cool to temperate climates and performs best in full sun with well-drained, fertile soil. Delphinium establishes steadily and is suitable for garden beds, borders, and landscape planting, where it provides vertical structure and seasonal flowering.
Features
- Upright plant with tall, sturdy stems
- Produces dense flower spikes with layered blooms
- Suitable for cool to temperate climates
- Adaptable to garden beds, borders, and landscape planting
- Adds vertical structure to planting areas
Specifications
- Scientific name: Delphinium spp.
- Common name (US): Delphinium
- Seed type / variety: Open-pollinated
- Growth habit: Upright, herbaceous perennial (some grown as annual)
- USDA zones: 3–7
- Planting season: Spring
- Growing season: Spring to summer
- Sowing Season: February to April
- Germination time and conditions: 14–21 days at 15–18°C
- Sunlight requirements: Full sun
- Soil requirements: Well-drained, fertile soil
- Watering needs: Moderate, consistent moisture
- Mature plant size: 90–180 cm height, 30–60 cm spread
- Plant spacing: 30–45 cm between plants
