Blue Glitter Sea Holly
Eryngium planum 'Blue Glitter'
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low
Humidity
Low
Lifespan
Perennial
Native To
Central and Southeastern Europe, Central Asia
Toxicity
Non-toxic
The Story
Plant Bio
Eryngium planum, commonly known as blue sea holly, is known for its striking blue spiky flowers and thistles. The cultivar 'Blue Glitter' features even more intense blue coloration and a more compact growth habit compared to the species.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and promote root growth.
- Allow plants to establish for 6 weeks before watering deeply.
- Fertilize with a balanced, low-nitrogen fertilizer during active growth.
- Prune back faded flower stems to encourage new blooms.
- Mulch around plants to retain moisture and suppress weeds.
Pro Tip
Plant in full sun with well-draining soil for vibrant blue foliage and flowers.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Apply a balanced fertilizer in spring
- Deadhead spent flowers to promote rebloom
- Provide good air circulation to prevent fungal issues
Don't
- Avoid overwatering to prevent root rot ❌
- Don't plant in heavy clay soil without amendment
- Never neglect to prune for shape and health
- Avoid excessive nitrogen which can reduce flower production
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| 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 Glitter Sea Holly questions
What zones can Blue Glitter Sea Holly grow in?
Blue Glitter Sea Holly is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Glitter Sea Holly deer resistant?
Yes — Blue Glitter Sea Holly is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Blue Glitter Sea Holly bloom?
Blue Glitter 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 Glitter Sea Holly need full sun?
Blue Glitter Sea Holly does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Blue Glitter Sea Holly drought tolerant?
Yes — once established (usually after the first full season), Blue Glitter 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 Hobbit Eryngium
Eryngium x zabelii 'Blue Hobbit'
Picos Blue Sea Holly
Eryngium bourgatii 'Picos Blue'
Jos Eijking Sea Holly
Eryngium x hybrida 'Jos Eijking'
Keep exploring
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Grow Blue Glitter 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.
