Delphinium Seeds – Blue Candle Larkspur

Delphinium Seeds – Blue Candle Larkspur produce tall, elegant flower spikes covered with striking blue blossoms that add height and beauty to garden beds and borders. Known for their graceful appearance and vibrant color, these plants are a favorite in cottage gardens and floral arrangements. The Blue Candle Larkspur variety is easy to grow and offers long-lasting blooms that attract bees, butterflies, and other pollinators.

Ideal for cool climates, Delphiniums prefer full sunlight and nutrient-rich, well-drained soil. Their vertical growth habit makes them perfect as a backdrop for shorter plants, creating a dramatic layered effect in any garden landscape.

Features:

• Type: Perennial flowering plant (grown as annual in some regions)

• Common Name (US): Delphinium (Candle Larkspur)

• Variety: Blue Candle

• Flower Color: Deep blue

• Bloom Size: 1–2 inches across, on tall spires

• Growth Habit: Upright, tall spikes

• Height: 3–6 feet (90–180 cm)

• Soil Requirement: Rich, well-drained, slightly alkaline soil

• Sunlight: Full sun to partial shade

• Watering: Regular; keep soil evenly moist

• Bloom Time: Late spring to mid-summer

• Special Feature: Attracts pollinators and adds vertical accent to gardens

Specifications:

• Planting Season: Early spring or fall

• Hardiness Zones (USDA): Zones 3–7

• Sowing Method: Direct sow outdoors after frost or start indoors 6–8 weeks before last frost

• Germination Time: 14–21 days

• Germination Temperature: 60–65°F (15–18°C)

• Spacing Between Plants: 18–24 inches (45–60 cm)

• Mature Plant Height: 3–6 feet (90–180 cm)

• Best Growing Months:

  • Northern Zones (3–5): May to August

  • Mid Zones (6–7): April to July

  • Southern Zones (8–9): February to May

• Maintenance: Moderate; stake tall plants to prevent bending, deadhead spent blooms for prolonged flowering

• Uses: Borders, garden beds, cut flower arrangements, pollinator-friendly landscapes