Pacific Giant Delphinium
Delphinium x belladonna 'Pacific Giant'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
60 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7
Water
Moderate
Humidity
Average
Lifespan
Short-lived perennial
Native To
Cultivated hybrid
Toxicity
All parts are toxic if ingested
The Story
Plant Bio
Tall and stately perennial with lush foliage and spikes of vibrant flowers. Known for its impressive height and large flower spikes, particularly suitable for cutting gardens.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into moist soil in early spring for best germination.
- Mist cuttings regularly to keep humidity high during propagation.
- Transplant seedlings after they develop 2-3 sets of true leaves, typically in spring.
- Water deeply once a week during dry periods to promote healthy roots.
- Fertilize with a balanced 10-10-10 formula every 4-6 weeks during growing season.
- Stake tall flower stems to prevent wind damage and support blooms.
Pro Tip
Plant in well-drained soil with rich organic matter and provide partial shade for vigorous growth.
Keep It Thriving
Care Guide
Do
- Water consistently to keep soil moist but not waterlogged 🌱
- Apply mulch to retain soil moisture and regulate temperature
- Deadhead spent flowers to encourage more blooms
- Provide support for tall flower spikes
Don't
- Avoid overwatering to prevent root rot ❌
- Do not fertilize with high nitrogen in late season
- Never disturb roots during transplanting
- Avoid full sun exposure in very hot climates
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Prune | ||||||||||||
| Stake |
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
Pacific Giant Delphinium questions
What zones can Pacific Giant Delphinium grow in?
Pacific Giant Delphinium 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 Pacific Giant Delphinium deer resistant?
Not reliably. Deer may browse Pacific Giant Delphinium, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Pacific Giant Delphinium bloom?
Pacific Giant Delphinium typically blooms in early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Pacific Giant Delphinium need full sun?
Pacific Giant Delphinium does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Delphinium to compare
Delphinium 'Double Blue'
Delphinium elatum 'Double Blue'
Larkspur
Delphinium elatum 'Magic Fountain Lavender'
Belladonna Delphinium
Delphinium x belladonna 'Dark Blue Dark Bee'
Faust Delphinium
Delphinium elatum 'Faust'
Summer Nights Larkspur
Delphinium elatum 'Summer Nights'
Tall Larkspur
Delphinium elatum
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Pacific Giant Delphinium 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.
