Blue eryngo 'Blue Cap' (Eryngium planum 'Blue Cap')

Blue eryngo 'Blue Cap'

Also known as: Flat sea-holly 'Blue Cap'

Blue eryngo 'Blue Cap' produces a number of thistle-like, brilliant blue flower heads adorned with prominent spiky bracts, just like the species. This cultivar is more compact and floriferous than its parent plant. It makes a great cut flower.

Scientific classification

Carrots, ivies and allies

Instantly identify plants with a snap

Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.

Download the App for Free

Perennial

Lifespan

Shrub

Plant Type

Purple, Blue

Flower Color

Winter dormancy

Dormancy

Deciduous

Leaf type

5 - 35 ℃

Ideal Temperature

Care Guide for Blue eryngo 'Blue Cap'

Twice per week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Blue eryngo 'Blue Cap' thrives in well-drained, gritty soils similar to its native grasslands, requiring moderate hydration twice a week. This hardy perennial prefers drier conditions, making drainage essential to prevent waterlogging, especially during its active growing season in outdoor settings like rock gardens or borders.

Fertilize: Fertilize blue eryngo 'Blue Cap' sparingly with balanced or high-nitrogen fertilizers in spring/summer, quarterly at most. Reduce frequency in colder months to prevent nutrient build-up. Water blue eryngo 'Blue Cap' before and after fertilizing to enhance absorption and minimize root burn, avoiding over-fertilization to prevent poor growth and pest attraction.

Pruning: Introduced for its spiky blue flowers and silvery foliage, blue eryngo 'Blue Cap' benefits from early spring pruning. Remove dead stems and cut back older foliage to promote new growth while maintaining its natural rosette shape. Regular pruning enhances blooming and overall plant vigor.

Propagation: Blue eryngo 'Blue Cap' can be propagated from healthy, non-flowering stem cuttings. Use segments with multiple nodes, plant in well-draining soil, and maintain high humidity and indirect light. Mist regularly; roots develop in a few weeks, allowing for subsequent transplanting to a permanent location.

Get tips and tricks for your plants.

Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.

Download the App for Free

Learn More About Blue eryngo 'Blue Cap'

Plant disease auto-diagnose & prevention

AI-powered plant doctor helps you diagnose plant problems in seconds.

Download the App for Free