Pacific Giant ‘King Arthur’ – 110 Seeds (Delphinium cultorum)

Pacific Giant ‘King Arthur’ (Delphinium cultorum) is a striking perennial with tall, majestic spikes of deep blue flowers. Ideal for borders and cottage gardens, it creates a dramatic vertical display from mid-summer to early autumn. Easy to grow in well-drained soil and full sun, this variety attracts pollinators and adds a bold, elegant statement to any garden.

Why Grow "King Arthur"

• Tall, majestic spikes of deep blue flowers

• Long flowering season from mid-summer to early autumn

• Creates dramatic vertical accents in borders and gardens

• Attracts bees and butterflies

Key Features

• Type: Perennial (Delphinium cultorum)

• Height: 120–180 cm

• Flowering: July–September

• Position: Full sun

• Uses: Borders, cottage gardens, cutting gardens, pollinator-friendly planting

Ideal For

• Tall border displays

• Cottage-style and pollinator-friendly gardens

• Cutting gardens for dramatic arrangements

• Adding vertical color and structure

Sowing & Growing

• Sow indoors: February–April in trays or pots

• Sow outdoors: April–May after frost

• Germination: 14–21 days at 18–20°C

• Thin seedlings to 30–40 cm apart

• Prefers well-drained, fertile soil and full sun

• Stake taller plants to prevent flopping