King Arthur Delphinium

King Arthur Delphinium (Delphinium 'King Arthur')

King Arthur Delphinium (Delphinium 'King Arthur') is a regal, tall-growing perennial admired for its majestic spires of rich purple flowers with striking white centers. Blooming in early to mid-summer, this bold variety adds height, color, and dramatic presence to perennial borders, cottage gardens, and pollinator-friendly landscapes. Its nectar-rich flowers attract hummingbirds, butterflies, and bees, making it both an ornamental and ecologically beneficial choice.

Distinctive Features

King Arthur Delphinium produces towering flower spikes densely packed with deep purple, semi-double blooms contrasted by bright white bees. The deeply lobed green foliage creates a lush backdrop, enhancing the striking floral display. As part of the Pacific Giant series, this variety is known for its vigorous growth, sturdy stems, and long-lasting blooms.

Growing Conditions

• Sun Exposure: Prefers full sun; tolerates partial shade in warmer climates.
• Soil: Thrives in rich, well-draining, fertile soil with consistent moisture.
• Water: Requires regular watering; does not tolerate prolonged dry conditions.
• Humidity: Prefers moderate humidity with good air circulation.
• USDA Hardiness Zones: 3-7, best suited for temperate and cooler climates.

Ideal Uses

• Perennial Borders: Adds height, structure, and deep color to garden beds.
• Pollinator Gardens: A valuable nectar source for bees, butterflies, and hummingbirds.
• Cottage Gardens: Complements classic perennials such as roses, foxgloves, and peonies.
• Cut Flower Gardens: Long-lasting, sturdy blooms make excellent floral arrangements.
• Mass Planting: Creates a dramatic display when grouped together.

Low Maintenance Care

King Arthur Delphinium is a hardy perennial that thrives with proper care and support.

• Watering: Keep soil consistently moist but not waterlogged.
• Pruning: Deadhead spent blooms to encourage reblooming.
• Staking: Requires support due to its tall flower spikes.
• Fertilizing: Benefits from a balanced fertilizer in spring and early summer.
• Pest and Disease Resistance: Resistant to deer but may require protection from slugs and powdery mildew.
• Winter Care: Cut back spent foliage in late fall; mulch in colder climates for root protection.

Why Choose King Arthur Delphinium?

King Arthur Delphinium is a standout variety that brings royal color, height, and pollinator appeal throughout the summer.

• Deep Purple Blooms with White Centers: Bold, contrasting flowers create a dramatic garden display.
• Attracts Pollinators: Provides nectar for bees, butterflies, and hummingbirds.
• Graceful, Tall Flower Spikes: Adds vertical elegance and structure to borders.
• Ideal for Cutting: Sturdy stems and long-lasting flowers make it perfect for floral arrangements.
• Low Maintenance & Weather Resistant: Strong stems and improved durability make it a reliable performer.

For a striking perennial that adds height, vibrant color, and pollinator appeal to the garden, King Arthur Delphinium (Delphinium 'King Arthur') is an exceptional choice.