50 Dark Blue Delphinium Seeds, Tall Spikes, Deep Indigo Blooms, Perennial, Cut Flower, Cottage Garden

These dark blue delphinium seeds produce tall, majestic spikes of deep indigo blooms that add vertical drama to any garden. As a perennial variety, they return year after year, making them a favorite for cottage gardens and cut flower arrangements.

Ideal for the back of sunny borders or as a striking accent, these delphiniums attract pollinators and create stunning cut flowers. Their spiky habit brings structure and height, while the rich blue hue provides a classic, romantic feel.

Species: Delphinium elatum
Variety: Dark Blue
Type: Perennial
Plant Habit: Upright, tall spikes
Sun: Full sun to light afternoon shade
Soil: Well-draining, fertile, slightly alkaline
Days to Harvest: 90–120 days from seed to bloom
Zones: 3–7
Germination: Cold stratify or direct sow; 65–75°F for 2–3 weeks
Sowing: Surface sow, light needed; press into soil
Spacing: 12–18 inches apart
Notes: Tall stems may require staking in windy areas