Sea Holly

Quick Facts:

    • Drought tolerant
    • Can grow near the shore
    • Perennial
    • Deer resistant

Sea Holly

Description:

Eryngium planum. This drought tolerant perennial thrives in sandy, well drained soil. Its stiff, spiny leaves are bluish green with silvery veins. It forms a clump over time, and blooms from June to September. The blue flowers and foliage provide superb contrast against brighter flowers or against areas of summer drought. Direct sow the seeds in autumn, or stratify in the fridge for three weeks if sowing in the spring. This involves planting into moist soil and enclosing the container in a plastic bag in the fridge. When the three weeks are up, move the bagged container into a warm room and await germination. Either way, this simulation of winter improves germination in Sea Holly seeds. This species type grows to 50cm (20") tall.

Size: SKU: Price: Availability: Quantity: Total:
0.05g (approx. 38 seeds) FL1206A $3.29 In stock $0.00
0.25g (approx. 190 seeds) FL1206B $4.99 Unavailable  
1g (approx. 761 seeds) FL1206C $7.99 In stock $0.00
5g (approx. 3805 seeds) FL1206D $11.99 In stock $0.00
25g (approx. 19025 seeds) FL1206E $41.99 In stock $0.00
$0.00

Quick Facts:

    • Drought tolerant
    • Can grow near the shore
    • Perennial
    • Deer resistant

How To Grow

Known as Sea Holly as it thrives in the sandy, well-drained soil near seashores. The seeds of Eryingium can be tricky to germinate, but if you follow our How to Grow Eryngium instructions, you should have good success.

General
Good drainage is fundamental to growing this plant.

Latin
Eryngium planum
Family: Apiaceae

Difficulty
Somewhat challenging

Exposure: Full sun
Zone: Hardy to Zone 5

Timing
Germination can be slow, and the seeds benefit from vernalization. Sow pre-moistened flats and seal them in plastic bags in late winter. Refrigerate for two to three weeks. Then move the flats outdoors to a shady location after all threat of frost has passed. Transplant as seedlings appear, which usually takes two to three weeks. Or, more simply, direct sow in the fall.

Starting
Sow seeds 2mm (1/8″) deep. Germination can take 5 to 90 days, so be patient.

Growing
Water only during very dry spells. Carefully mulch around the crowns with fine gravel to keep plants dry over winter. The long taproots make transplanting difficult.