Introduction
Delphinium (Delphinium elatum) is a classic cottage garden perennial producing tall, dramatic spikes of flowers in shades of blue, purple, pink, and white. It is a moderate cool-season plant that performs best in Florida's fall and winter seasons when temperatures are cooler. Available in an 8-inch pot.
Growing conditions
- Light: Full sun to partial shade; best flowering in full sun with afternoon shade in Florida.
- Water: Moderate; keep soil consistently moist but not waterlogged.
- Soil: Rich, well-draining soil with good organic matter.
- Fertilizer: Balanced slow-release fertilizer at planting; liquid fertilizer monthly during the growing season.
- Season: Cool-season perennial; performs best in Florida's fall and winter seasons.
Planting tips
Plant in fall in Florida for best performance. Excellent for borders, cottage gardens, and cut flower gardens. Stake tall varieties to prevent wind damage. Deadhead spent flower spikes to encourage a second flush of blooms. In Florida, treat as a cool-season annual as it does not tolerate summer heat.
Troubleshooting
Powdery mildew
Fungal disease in humid conditions. Improve air circulation and avoid overhead watering.
Crown rot
Overwatering or poor drainage. Reduce watering and ensure soil drains freely.
Aphids
Check new growth for colonies. Treat with insecticidal soap or a strong water spray.
Pet safety
All parts of Delphinium are toxic to pets and humans if ingested. Keep away from children and animals.
Quick care summary
Difficulty: Moderate. Light: Full sun to partial shade. Watering: Moderate, keep consistently moist. Humidity: Low to moderate. Pet safety: Toxic to pets and humans.
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