Eryngium elevatum
Sea Holly
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Full Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low
Humidity
Low to moderate
Lifespan
Perennial
Native To
Mexico
Toxicity
Spiny bracts can cause skin irritation.
The Story
Plant Bio
Eryngium elevatum, a species of Sea Holly, is an upright, clump-forming perennial prized for its architectural form. It features thistle-like, blue to amethyst flower heads on branching stems, surrounded by spiny bracts, which attract a wide range of pollinators. Native to Mexico, this species stands out with its tall, branching stems bearing numerous small, ovoid flower heads. The entire plant, from stems to bracts, often takes on a striking metallic blue or amethyst hue.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Choose well-drained sandy or gravelly soil for planting.
- Tuck seeds into the soil surface and water gently after sowing.
- Allow seedlings to establish for 4-6 weeks before thinning.
- Transplant mature plants in early spring or fall for best results.
- Mist cuttings in a humid environment to promote root growth.
- Apply a light mulch to conserve moisture and suppress weeds.
Pro Tip
Ensure excellent drainage to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water sparingly, allowing soil to dry out between watering 🌱
- Prune dead or damaged stems to maintain shape
- Apply a balanced, low-nitrogen fertilizer in early spring
Don't
- Avoid overwatering, which can cause root rot ❌
- Don’t disturb roots excessively during pruning
- Refrain from using heavy, clay-rich soils
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Harvest | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| 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