Eryngium Alpinum

Description

Eryngium Alpinum, also known as Alpine Sea Holly or Alpine Eryngo, is a herbaceous perennial plant that belongs to the Apiaceae family. It is native to mountainous regions of Central and Southern Europe, where it thrives in rocky, well-drained soils. The plant can grow up to 60 cm in height and 40 cm in width, and it blooms from June to August.

Taxonomic Information

Appearance

The Eryngium Alpinum plant has a unique appearance, with spiky, silver-blue leaves and cone-shaped flowers that are surrounded by a spiky collar. The flowers can range in color from blue to purple, and they bloom on sturdy stems that are covered in spines. The leaves of the plant are also spiny, and they form a rosette at the base of the stem. The plant’s overall appearance is striking and eye-catching, making it a popular choice for ornamental gardens.

Care Guide

Eryngium Alpinum is a relatively low-maintenance plant, but it does require some care to thrive. Here are some tips to help you care for your Alpine Sea Holly:

• Water: The plant prefers well-drained soil that is moist but not waterlogged. Water it regularly during the growing season, but allow the soil to dry out slightly between waterings.
• Fertilization: The plant does not require fertilizer, but you can add a balanced, slow-release fertilizer in the spring if desired.
• Soil: The plant prefers well-drained, sandy soil that is rich in organic matter. It can tolerate slightly alkaline or acidic soil.
• Sunlight: The plant prefers full sun to partial shade. It can tolerate some shade, but it may not bloom as prolifically.
• Hardiness Zones: The plant is hardy in USDA zones 4-9, which means it can tolerate temperatures as low as -30°F (-34°C) in the winter.

Common Pests & Diseases

Eryngium Alpinum is relatively pest and disease-resistant, but it can be susceptible to some issues. Here are some common pests and diseases to watch out for:

• Aphids: These small, sap-sucking insects can weaken the plant and cause stunted growth. Use insecticidal soap or neem oil to control them.
• Spider Mites: These tiny pests can cause yellowing and curling of the leaves. Use insecticidal soap or neem oil to control them.
• Crown Rot: This fungal disease can cause the plant to wilt and die. Avoid overwatering and make sure the soil is well-drained.

Habitat

Eryngium Alpinum is native to mountainous regions of Central and Southern Europe, where it grows in rocky, well-drained soils. It is commonly found in alpine meadows, on rocky slopes, and along stream banks. The plant is adapted to cold temperatures and can tolerate harsh weather conditions, making it well-suited to high-altitude environments.

Question and Answer

Q: Is Eryngium Alpinum drought-tolerant?

A: Yes, the plant is relatively drought-tolerant once established. However, it does prefer moist soil and may not bloom as prolifically if it becomes too dry.

Q: Can Eryngium Alpinum be grown in containers?

A: Yes, the plant can be grown in containers as long as the container is large enough to accommodate the plant’s roots and the soil is well-drained.

Q: How do I propagate Eryngium Alpinum?

A: The plant can be propagated by division in the spring or fall. Simply dig up the plant and divide it into smaller sections, making sure each section has roots and foliage. Replant the sections in well-drained soil.

Q: How long does Eryngium Alpinum live?

A: The plant is a perennial and can live for several years if cared for properly.

Related Plants

• Eryngium Planum
• Eryngium Giganteum
• Eryngium Bourgatii
• Eryngium Aquaticum
• Eryngium Maritimum

References

• “Eryngium Alpinum.” Missouri Botanical Garden. Accessed August 23, 2021. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=283665&isprofile=0&basic=Eryngium%20alpinum.
• “Eryngium Alpinum – Plant Finder.” Dave’s Garden. Accessed August 23, 2021. https://davesgarden.com/guides/pf/go/62858/.
• “Eryngium Alpinum.” Royal Horticultural Society. Accessed August 23, 2021. https://www.rhs.org.uk/plants/20436/eryngium-alpinum/details.