Delphinium 'Double Blue'
Delphinium elatum 'Double Blue'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
60 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7
Water
Medium
Humidity
Average
Lifespan
Short-lived perennial
Native To
Europe and Asia
Toxicity
All parts are highly toxic if ingested
The Story
Plant Bio
Delphinium elatum is a stately, clump-forming perennial known for its tall, elegant spires of densely packed flowers, adding vertical interest to the garden. Double flower structure with rich blue coloring.
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds in well-draining soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and encourage root growth.
- Transplant seedlings after danger of frost has passed, typically in late spring.
- Water deeply once a week, especially during dry spells, to keep soil moist.
- Feed with a balanced fertilizer every 4-6 weeks during the growing season.
- Pinch back the top few inches to promote bushier growth and more flowers.
Pro Tip
Plant in full sun with rich, well-draining soil for vibrant blooms and healthy growth.
Keep It Thriving
Care Guide
Do
- Water consistently to keep soil moist but not waterlogged 🌱
- Mulch around plants to retain moisture and suppress weeds
- Fertilize every 4-6 weeks with a balanced fertilizer
Don't
- Avoid overwatering, which can lead to root rot ❌
- Do not disturb roots during flowering
- Refrain from planting in poorly drained areas
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Stake | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Delphinium 'Double Blue' questions
What zones can Delphinium 'Double Blue' grow in?
Delphinium 'Double Blue' is hardy in USDA Zones 4–7. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Delphinium 'Double Blue' deer resistant?
Not reliably. Deer may browse Delphinium 'Double Blue', especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Delphinium 'Double Blue' bloom?
Delphinium 'Double Blue' typically blooms in early to mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Delphinium 'Double Blue' need full sun?
Delphinium 'Double Blue' does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Delphinium to compare
Larkspur
Delphinium elatum 'Magic Fountain Lavender'
Belladonna Delphinium
Delphinium x belladonna 'Dark Blue Dark Bee'
Faust Delphinium
Delphinium elatum 'Faust'
Pacific Giant Delphinium
Delphinium x belladonna 'Pacific Giant'
Summer Nights Larkspur
Delphinium elatum 'Summer Nights'
Tall Larkspur
Delphinium elatum
Keep exploring
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Grow Delphinium 'Double Blue' with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
