Delphinium 'King Arthur' Seeds
Delphinium Pacific Giants 'King Arthur'
‘King Arthur’ Delphinium with magnificent blue spires.
A towering gem from the esteemed Pacific Giants collection, ‘King Arthur boasts majestic floral spires accentuated by contrasting white centres. These royal blooms elegantly define the back of garden borders, achieving peak brilliance, particularly in their second season. Requiring some patience, they mature beautifully, unfolding their true majestic form with time.
Approx 30 seeds
- Pollinator-Friendly
- Likes Sun
- Hardy Perennial
- Big Gardens
Delphinium 'King Arthur' Seeds – Quick Growing Guide
Delphinium 'King Arthur' seeds produce tall, striking perennial flowers ideal for UK gardens. Sow from March to September, with germination in 7–14 days. These delphiniums thrive in full sun and well-drained soil, requiring regular watering. Perfect for cut flower displays and adding height to borders.
How to Sow, Grow and Harvest Delphinium 'King Arthur' Seeds
- Sow:March–September, direct or in pots
- Germination:7–14 days
- Grow:Full sun, well-drained soil, support tall stems
- Water:Keep soil moist but not waterlogged
- Harvest:Cut flowers when buds show colour for longest vase life
- Best for:Borders, cut flower beds, cottage gardens
Delphinium 'King Arthur' is a striking perennial known for its tall floral spires and vivid blue blooms with contrasting white centres. Ideal for adding height and colour to garden borders or cut flower displays. These seeds require patience but reward you with majestic flowers, especially in their second season.
Delivered within 2-5 working days via our standard delivery
Standard Delivery
For standard delivery, we’ll work with our delivery partners to ensure you receive your delivery within 2-5 working days.
Express Delivery
You can also send this item the next day, just place the order before 11 am and we'll get it sent out the same day to arrive the following day.
Gifting
Want to send this as a gift? We can include a handwritten note, just add what you'd like to write at checkout.
If you’re worried about your delivery or have any other questions please get in touch at [email protected] and one of our team will come back to you as soon as we can.
For more information on our shipping services, have a look at our FAQs.
Grow in Your Garden
Calendar
How to Grow
Delphinium 'King Arthur' seeds should be started indoors in early spring, ideally from March to June, in a cool, bright spot to encourage healthy growth. Once the risk of frost has passed, transplant them outdoors into containers or garden beds where they can thrive.
Sowing
To improve germination, place the seeds in the refrigerator for about a week before sowing, then sow them indoors during the recommended months of March, April, May, June, August, September, or October.
Growing
After germination, pot on seedlings carefully and harden them off before planting out, ensuring they have enough space to grow tall, up to the recommended pot size of 45 cm, which supports their stature as tall cut flowers.
Plant care
Water Delphinium 'King Arthur' regularly to keep the soil moist but well-drained, especially during the growing months from June to September. Support the tall flower stems as needed and deadhead spent blooms to encourage continuous flowering throughout the season.
About Delphinium 'King Arthur'
Tall spires of bright blue flowers with white centres, perfect for cut flower gardens and borders.
- Pollinator-Friendly
- Likes Sun
- Hardy Perennial
- Big Gardens
History of Delphinium 'King Arthur'
Delphiniums symbolise cheerfulness, goodwill and joy. 'King Arthur' is a royal addition to your garden, representing encouragement and good fortune. These flowers are often gifted to remember loved ones fondly.
| Other Names | Larkspur, Lark's Heel, Lark's Claw and Knight's Spur |
|---|---|
| Pet/Baby Safe | Toxic |
FAQs
Sow indoors in late winter or early spring for best results.
They can self-seed if flowers are left to go to seed, but regular deadheading encourages better blooms.
Provide full sun, well-drained soil, and support tall stems to prevent flopping.