Eryngium Seeds - Alpinum
USDA Zones: 4 - 9
Height: 28 inches
Bloom Season: Summer to fall
Bloom Color: Blue
Environment: Full sun to partial shade
Soil Type: Well-drained soils, pH 6.8 - 7.2
Deer Resistant: Yes
House Plant: No
Latin Name: Eryngium Alpinum
Temperature: 64 to 72F for the first 2-4 weeks. After this period, the sowing must be kept at a cold temperature between 25 and 39F for another 4 - 6 weeks
Average Germ Time: 28 - 56 days
Light Required: No
Depth: Surface sow seed and press tightly in to soil
Sowing Rate: 4 - 5 seeds per plant
Moisture: Keep seeds moist until germination
Plant Spacing: 24 inches
Care & Maintenance: Eryngium
Sea Holly Alpinum (Eryngium Alpinum Superbum) - Eryngium Alpinum Superbum is nothing short of fantastic and is easy to grow from Eryngium seeds. It is commonly known as Alpine Sea Holly, and it is one of the showiest Sea Holly plants available on the market. The metallic stems and large thistle-like flowers mature to an intense steel blue color from summer through fall.
Perfect for cutting
The summer-blooming blossoms, which are actually soft-to-the-touch, harden to long-lasting cut flowers that are perfect for drying and preserving.
Eryngium seed | alpinum
How to grow
How To Grow Sea Holly Alpinum From Seed: Alpine Sea Holly will grow from flower seeds in partial shade, but prefers full sun. It is a deciduous, tap-rooted perennial that dislikes root disturbances, so it is best to start Eryngium seeds directly outdoors.
Sow seeds in the spring after frost season has passed. Surface sow Eryngium seeds and then tightly press into the soil. Seeds must be kept moist until germination begins.
- Sowing Rate: 4 - 5 seeds per plant
- Average Germ Time: 28 - 56 days
- Keep moist until germination
- Attracts bees and butterflies
- Depth: Surface sow seed and tightly press in to soil
An elegant species for the herbaceous border, Eryngium Sea Holly is perfect for exciting displays and for cutting. Eryngium plants have a long season of visual interest, even to the winter garden. Sea Holly can withstand severe frosts and is a tough plant for full sun in well drained, light soils.
- Height: 28 inches
- USDA Zones: 4 - 9
- Season: Perennial
- Deer Resistant: Yes
- Drought Tolerant: Yes