Steel-Blue Flowers
Produces distinctive rounded flower heads surrounded by spiny blue bracts for a bold ornamental display.
Eryngium Planum Seeds for Sale
Suitable for home gardening use
Regular price
Rs. 16.99 INR
Sale price
Rs. 16.99 INR
Regular price
Tax included.
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Estimated Delivery:Nov 21 - Nov 25
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Product description
Eryngium Planum Seeds
Eryngium planum, commonly known as blue sea holly, is a striking perennial flowering plant admired for its steel-blue flower heads, spiny bracts, and silvery-blue stems. It adds distinctive texture and color to cottage gardens, flower borders, and naturalistic landscapes. This hardy ornamental plant attracts pollinators and is also valued for its use in dried flower arrangements. Eryngium planum grows best in sunny locations with well-drained soil.
Blue Sea Holly
Blue Flower Heads
Perennial Flower
Pollinator Garden
Key Features
Architectural Foliage
Features spiny foliage and sturdy stems that add structure and contrast to garden plantings.
Pollinator-Friendly Blooms
The nectar-rich flower heads can attract bees and other beneficial pollinating insects.
Dried Flower Interest
Its distinctive flower heads and sturdy stems are suitable for dried floral arrangements and decorative displays.
Product Highlights
Scientific name: Eryngium planum
Commonly called blue sea holly
Distinctive steel-blue flower heads
Perennial ornamental plant
Suitable for sunny flower borders
Attracts bees and pollinators
Useful for dried flower arrangements
Prefers well-drained soil
Specifications
| Scientific Name | Eryngium planum |
| Common Name | Blue Sea Holly; Flat Sea Holly |
| Plant Family | Apiaceae |
| Product Type | Flower Seeds |
| Plant Type | Herbaceous Perennial |
| Flower Color | Steel blue to violet-blue |
| Foliage Color | Green to bluish-green |
| Blooming Season | Summer to early autumn, depending on climate |
| USDA Hardiness Zones | Generally 4–9, depending on local conditions |
| Sunlight Requirements | Full sun |
| Soil Requirements | Well-drained, moderately fertile soil |
| Watering | Moderate; established plants tolerate some dryness |
| Planting Season | Spring or autumn, depending on local climate and seed treatment |
| Germination Time | Variable; may be several weeks or longer |
| Germination Conditions | May benefit from a period of cold stratification; follow supplier instructions |
| Mature Plant Height | Approximately 60–90 cm (24–36 inches) |
| Plant Spacing | Approximately 30–45 cm (12–18 inches) |
| Growing Location | Flower beds, borders, pollinator gardens, and suitable containers |
Growing Guide
Step 1: Prepare the Seeds
Check the seed packet for recommended pretreatment. Eryngium planum seeds can have variable germination, and some seed lots benefit from cold stratification.
Check the seed packet for recommended pretreatment. Eryngium planum seeds can have variable germination, and some seed lots benefit from cold stratification.
Step 2: Prepare the Soil
Choose a sunny location with well-drained soil. Avoid areas where water collects, as excessive moisture can damage the roots.
Choose a sunny location with well-drained soil. Avoid areas where water collects, as excessive moisture can damage the roots.
Step 3: Sow the Seeds
Sow the seeds according to the supplier's instructions. Use a suitable seed-starting mix and avoid burying the seeds too deeply.
Sow the seeds according to the supplier's instructions. Use a suitable seed-starting mix and avoid burying the seeds too deeply.
Step 4: Provide Sunlight and Moisture
Place the growing containers in a bright location and maintain appropriate moisture during germination. Keep the medium moist but not waterlogged.
Place the growing containers in a bright location and maintain appropriate moisture during germination. Keep the medium moist but not waterlogged.
Step 5: Transplant and Maintain
Transplant established seedlings carefully into a sunny, well-drained location. Allow sufficient spacing for mature growth and avoid excessive watering once plants are established.
Transplant established seedlings carefully into a sunny, well-drained location. Allow sufficient spacing for mature growth and avoid excessive watering once plants are established.
Add Blue Texture to Your Garden with Sea Holly
Eryngium planum brings distinctive steel-blue flower heads, architectural foliage, and seasonal interest to ornamental gardens. Its drought-tolerant nature once established and its appeal to pollinators make it a useful choice for sunny borders and naturalistic landscapes. Provide full sun, well-drained soil, and suitable seed-starting conditions to encourage healthy growth.
Frequently Asked Questions
Find answers about blue sea holly seed germination, flowering time, and growing requirements.
Do Eryngium planum seeds need cold stratification?
Eryngium planum seeds can germinate unevenly, and a period of cold stratification may improve germination for some seed lots. Requirements can vary with seed freshness and source. Follow the supplier's instructions for the recommended pretreatment before sowing.
How long does blue sea holly take to flower from seed?
Blue sea holly may flower in its first or second growing season, depending on when the seeds are started, growing conditions, and plant development. Germination and flowering times vary, so provide adequate sunlight and well-drained soil while the plants establish.
Can Eryngium planum grow in pots?
Yes, Eryngium planum can be grown in a sufficiently deep container with drainage holes. Use a well-drained growing medium and place the pot in full sun. Avoid overwatering, as this plant prefers soil that does not remain excessively wet.