Blue Sea Holly Seeds - Eryngium Planum, 20 seeds

Quantity: 20 Seeds / pack

Blue Sea Holly (Eryngium planum) produces steel-blue, spiny flower heads on branching stems in summer. Its architectural blooms suit sunny borders and are excellent for cutting and drying.

Why choose our seeds?

• Steel-blue, spiny flower heads on branching stems
• Architectural summer blooms for sunny borders
• Excellent for cutting and drying

How to grow Blue Sea Holly seeds

Choose Your Planting Method

• Indoors: Start in late winter after a cold stratification period.
• Outdoors: Sow in fall so winter provides natural chilling, for spring germination.

Prepare Your Materials

• Seed-starting trays or deep pots (if indoors)
• Sharply draining, sandy potting mix
• Spray bottle for misting

Sowing the Seeds

• Sow ⅛–¼ inch deep in moist, sharply drained mix.
• Give about 30 days of cold-moist stratification (in a refrigerator) before spring sowing, or sow outdoors in fall.

Provide the Right Conditions

• Light: Full sun.
• Temperature: Room temperature after the chilling period.
• Humidity: Keep the mix lightly moist; avoid soggy conditions.

Germination

• Germination is irregular — it may take a few weeks or as long as 90 days, so be patient.
• Grow on in full sun in sharply drained soil.

Transplanting

• Transplant carefully when seedlings are sturdy; sea hollies dislike root disturbance.
• Harden off before planting out.
• Space about 12 inches apart in sharply drained soil.

Care Tips

• Sun: Full sun.
• Water: Water during establishment; avoid waterlogged soil.
• Fertilizer: Generally not heavy feeders; lean soils are fine.

Bloom Time:

Summer, typically June to September.