Delphinium Seeds – Black Knight

Bring striking vertical beauty to your garden with Delphinium Seeds – Black Knight, a well-loved heirloom variety prized for its tall spires of deep violet-black blooms. Known for strong garden performance and impressive height, this cultivar is ideal for borders, cottage gardens, and cut-flower displays. These seeds are carefully selected to offer reliable germination and vigorous growth, making them suitable for both new and experienced gardeners.

Delphinium Black Knight thrives in cooler climates, producing tall flowering spikes that attract beneficial pollinators. With proper care, this perennial returns year after year, rewarding growers with bold color and elegant structure.

Features

• Heirloom Delphinium variety known for rich, dark-colored flower spikes

• Tall, upright growth habit ideal for borders and floral arrangements

• Non-GMO seeds with dependable germination

• Suitable for garden beds, perennial landscapes, and pollinator gardens

• Cold-hardy perennial returning yearly with proper care

Specifications

• Common Name (US): Delphinium

• Variety: Black Knight

• Plant Type: Hardy perennial

• Height at Maturity: Approximately 4–6 ft

• Bloom Time: Late spring to early summer

• Growing Season:

  • Sowing Indoors: Late winter to early spring (February–April)

  • Direct Sowing Outdoors: Early spring after frost (March–May)

• USDA Hardiness Zones: 3–7

  • Zone 3–4: Plant outdoors April–May

  • Zone 5–6: Plant outdoors March–April

  • Zone 7: Plant outdoors February–March

• Sunlight Requirements: Full sun

• Soil Preference: Rich, well-drained soil

• Germination Time: 14–28 days

• Spacing: 18–24 inches apart

• Watering Needs: Regular moisture, avoid waterlogging