Blue Jackpot Sea Holly
Eryngium planum 'Blue Jackpot'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Full Sun
Zones
5, 6, 7, 8, 9
Water
Low
Humidity
Low
Lifespan
Perennial
Native To
Eastern Europe to Central Asia
Toxicity
Non-toxic
The Story
Plant Bio
Eryngium planum, or Sea Holly, is an upright, clump-forming perennial with thistle-like, blue flower heads on branched, metallic-blue stems, appearing in summer. The basal leaves are heart-shaped, while stem leaves are more divided. This cultivar 'Blue Jackpot' is noted for its intense blue coloration and ability to thrive in drier conditions.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Choose a sunny location with well-draining soil to prevent root rot.
- Tuck seeds 1/4 inch deep into prepared soil, spacing 12 inches apart.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Transplant seedlings when they are sturdy, typically after 6 weeks.
- Mulch around plants to conserve moisture and suppress weeds.
- Fertilize lightly in early spring with a balanced, organic fertilizer.
Pro Tip
Ensure excellent drainage; adding sand or gravel improves soil and reduces fungal issues.
Keep It Thriving
Care Guide
Do
- Water moderately, allowing soil to dry between watering 🌱
- Prune back dead or damaged stems in early spring
- Apply organic compost annually for healthy growth
- Mulch to retain moisture and regulate soil temperature
Don't
- Avoid overwatering which can cause root rot ❌
- Don’t fertilize with high nitrogen fertilizers that promote floppy growth
- Refrain from disturbing roots when transplanting
- Do not plant in poorly drained soils
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Spring Cleanup |
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
Blue Jackpot Sea Holly questions
What zones can Blue Jackpot Sea Holly grow in?
Blue Jackpot Sea Holly is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Jackpot Sea Holly deer resistant?
Yes — Blue Jackpot Sea Holly is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Blue Jackpot Sea Holly bloom?
Blue Jackpot Sea Holly typically blooms in 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 Blue Jackpot Sea Holly need full sun?
Blue Jackpot Sea Holly does best in full sun (6+ hours).
Is Blue Jackpot Sea Holly drought tolerant?
Yes — once established (usually after the first full season), Blue Jackpot Sea Holly handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Eryngium to compare
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Eryngium yuccifolium
Big Blue Sea Holly
Eryngium x hybrida 'Big Blue'
Sea Holly
Eryngium elevatum
Blue Glitter Sea Holly
Eryngium planum 'Blue Glitter'
Blue Hobbit Eryngium
Eryngium x zabelii 'Blue Hobbit'
Picos Blue Sea Holly
Eryngium bourgatii 'Picos Blue'
Keep exploring
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Grow Blue Jackpot Sea Holly 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.
