Blueflower eryngo (Eryngium integrifolium)

Also known as: Bluejackets, Blue Thistle

Blueflower eryngo (Eryngium planum) is a striking perennial with unique, less divided foliage and firm, spiky flower heads. This plant thrives in full sun and prefers well-drained soil, making it ideal for gardens with sandy or loamy soil types. Its drought tolerance ensures it performs well in dry conditions, making it a great option for xeriscaping. Avoid over-fertilizing and overwatering, as this can hinder its growth and flowering. Providing some wind protection will help maintain the structural integrity of its stems.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Blueflower eryngo

Lifespan

Perennial

Plant Height

1 to 3 feet (30 to 90 cm)

Spread

1 to 2 feet (30 to 60 cm)

Leaf Color

Green

Flower Size

0.5 to 1 inch (1 to 2.5 cm)

Flower Color

Blue to Purple

Images of Blueflower eryngo

Quickly Identify Blueflower eryngo

Identify Eryngium integrifolium by its sharp, spiny leaves and vibrant blue to purple flower heads that bloom in summer. The plant has a rosette of basal leaves and tall flowering stems.

Scientific Classification of Blueflower eryngo

Phylum

Vascular plants

Class

Dicotyledons

Order

Apiales

Family

Umbellifers

Genus

Eryngos

Species

Blueflower eryngo

Planting and Growing of Blueflower eryngo

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

5.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Terracotta

How to Water Blueflower eryngo?

Eryngium integrifolium thrives with moderate watering. Ensure the soil remains moist but not waterlogged. Aim to provide around 150 ml of water per session, soaking the soil until it's damp but not dripping excess water.

What are the symptoms of an underwatered Blueflower eryngo? ›

What should I do if my Blueflower eryngo is not getting enough water? ›

What are the symptoms of an overwatered Blueflower eryngo? ›

How to save an overwatered Blueflower eryngo? ›

What Are the Sunlight Requirements for Blueflower eryngo?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours per day

Accepting both full and partial sun, Eryngium integrifolium benefits most from a consistent pattern of 6-8 hours of sunlight daily. Ideal sunlight encourages hardy development and boosts prolific flowering, showcasing its unique aesthetic.

What is the best lighting condition for Eryngium integrifolium? ›

How can ideal sunlight exposure be achieved? ›

What benefits arise from optimal sunlight exposure? ›

What Is the Ideal Temperature Range for Blueflower eryngo?

Ideal Temperature: 60 ~ 75℉

The ideal temperature range for Eryngium integrifolium is between 60°F and 75°F. This range promotes optimal growth, allowing the plant to thrive and develop its characteristic structure. Maintaining this temperature range ensures the plant utilizes nutrients efficiently and supports healthy photosynthesis.

What Soil is Best for Blueflower eryngo?

Soil type: Sandy soil, Sandy loam, Loam

Soil PH: 5.5 ~ 7.5

Eryngium integrifolium requires a well-draining soil to prevent root rot. This ensures the plant's roots get enough oxygen and avoid stagnation in water-logged conditions. This plant thrives in soil with moderate nutrient levels, avoiding over-fertilization which can lead to weak growth. Balanced nutrients support robust root development and vibrant foliage. While preferring well-draining soil, it also benefits from soil that can retain some moisture, helping the plant to withstand dry periods without wilting.

How to Fertilize Blueflower eryngo?

Fertilizer type: Balanced

Eryngium integrifolium prefers a modest amount of fertilizer. It thrives with a half-strength liquid fertilizer, making sure not to exceed one cup per application. Over-fertilizing can harm the plant and lead to reduced flowering.

How to Prune Blueflower eryngo?

Pruning Time: Spring, Summer, Autumn

Start by sterilizing your pruning shears with rubbing alcohol to prevent any disease transmission. Identify dead, damaged, or diseased stems and cut them at their base. Remove the faded flowering stems to encourage new growth and to tidy up the overall plant appearance. For shaping, trim gently around the edges to maintain a bushy and dense form. Be sure to make clean, precise cuts to minimize stress on the plant. More About Pruning Techniques→

How to Propagate Blueflower eryngo plant?

Propagate Time: Spring, Early spring, Late spring

Use a well-draining medium for all propagation methods. Mix potting soil with sand or perlite to improve drainage and create an ideal environment for root development.

Sow seeds thinly on the surface of the soil and lightly cover them. Maintain consistent moisture and provide indirect sunlight for successful germination.

Select healthy, non-flowering stems for cuttings. Cut 5-10 cm sections, including at least one node, and remove lower leaves. Dip in rooting hormone before planting.

More About Propagating Techniques→

How to Repot Blueflower eryngo plant?

Repotting frequency: Every 2-3 years

Repot Eryngium integrifolium when you notice the plant outgrowing its current pot, with roots appearing at the drainage holes. Another signal is if the growth slows down despite optimal care, or the potting soil starts to degrade, losing its structure and drainage qualities.

Select a pot that is one size larger than the current one, ideally made from breathable materials like terracotta. This helps in maintaining proper aeration for the roots, preventing waterlogging and root rot, and encourages healthy growth.

Opt for a well-drained sandy loam mix to ensure adequate drainage and root aeration. This soil type mimics the plant's natural habitat, helping to prevent overwatering issues and promoting robust root development and nutrient uptake.