Elecampane (Inula helenium)

Also known as: Elecampane inula, Horse-heal, Elf wort, Enula campana, Yellow starwort

Inula helenium, also known as elecampane, is sometimes called horse-heal or wild sunflower scabwort. This plant is native to Eurasia. According to legend, its association with Helen of Troy comes from the belief that elecampane sprang up from the places where her tears touched the ground.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Elecampane

Lifespan

Perennial, Annual, Biennial

Plant Type

Herb

Plant Height

90 cm to 1.5 m

Spread

60 cm to 90 cm

Leaf Color

Green

Flower Size

5 cm

Flower Color

Yellow

Images of Elecampane

Quickly Identify Elecampane

Netted vein pattern on elongated leaves

Distinctive string-like yellow petals in flower heads

Woolly underside on large, rough alternate leaves

Stout, densely woolly stem reaching up to 5 feet (150 cm)

Clusters of flowers with sunburst pattern around central disc

Scientific Classification of Elecampane

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Inula

Species

Elecampane

Planting and Growing of Elecampane

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Elecampane?

Inula helenium prefers moderate watering. Ensure that the soil remains slightly moist but not waterlogged. The golden rule is to water until moisture begins to trickle out of the drainage holes, recommending approximately 500 ml at a time.

What are the symptoms of an underwatered Elecampane? ›

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

What are the symptoms of an overwatered Elecampane? ›

How to save an overwatered Elecampane? ›

What Are the Sunlight Requirements for Elecampane?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours per day

Inula helenium prefers a light range comprising full sun to partial sun conditions. Adequate light promotes vigorous growth and stunning floral displays, enhancing both aesthetic and ecological benefits, such as attracting pollinators.

What are the ideal lighting conditions for Inula helenium? ›

How can one achieve ideal lighting for Inula helenium? ›

What benefits does ideal lighting provide to Inula helenium? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Elecampane?

Ideal Temperature: 60 ~ 75℉

Inula helenium thrives best within a temperature range of 60°F to 75°F. These temperatures mimic the plant's natural habitat, promoting steady growth and optimal health. During this range, the plant can effectively photosynthesize and absorb nutrients, leading to sturdier stems and vibrant foliage.

What Soil is Best for Elecampane?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Inula helenium thrives in well-drained soil to prevent root rot, ensuring the roots receive enough oxygen. This soil type prevents waterlogging, facilitating healthy root growth and preventing diseases. This plant requires soil of moderate fertility, rich in organic matter, which supports robust growth and vibrant blooms. Organic-rich soil also enhances microbial activity, improving nutrient availability for the plant. While this plant can tolerate drought, consistent moisture levels in the soil help maintain turgor pressure, keeping the leaves firm and the plant robust, particularly during dry spells.

How to Fertilize Elecampane?

Fertilizer type: Balanced

For Inula helenium, a balanced approach to fertilization is key. When using liquid fertilizer, aim for a dilution ratio of 1:2. This means one part fertilizer to two parts water, which caters to the plant's moderate nutrient needs without overwhelming it.

How to Prune Elecampane?

Pruning Time: Spring, Summer, Autumn

Begin by assessing the overall shape and health of your Inula helenium. Use sharp, clean shears to remove any dead or damaged stems, which helps prevent disease and decay. Cut back leggy growth to maintain the plant’s shape and encourage bushiness. Make cuts just above a leaf node to stimulate new growth. In late summer, after the primary blooming period, consider a more severe cutback. This involves removing the top third of the plant, which can rejuvenate the foliage and potentially induce a second bloom in autumn. Ensure that the plant is well-watered to recover quickly from this rigorous pruning. More About Pruning Techniques→

How to Propagate Elecampane plant?

Propagate Time: Spring, Early spring

Ensure the soil is well-draining and rich in organic material. Loosen the soil to a depth of about 12 inches to encourage root growth and aeration. Avoid using heavy clay soils.

When propagating through seeds, sow them in seed trays filled with starter mix. Lightly cover the seeds and maintain a consistent humidity by using a mist sprayer.

For division propagation, carefully dig around the plant and split the root ball into sections. Ensure each section has healthy roots attached, and plant them separately.

More About Propagating Techniques→

How to Repot Elecampane plant?

Repotting frequency: Every 2-3 years

It's time to repot Inula helenium when you notice roots are circling the bottom of the pot or pushing through the drainage holes. These signs indicate that the plant is root-bound and in need of more space to continue thriving. Additionally, if the soil seems compacted and isn't retaining moisture well, it might be time for a change.

When selecting a pot for your Inula helenium, opt for one that is slightly larger than the previous container—about 1-2 inches wider. Ensure that the pot has good drainage holes to prevent waterlogging, which can cause root rot. A terracotta pot is ideal as it allows air circulation and helps with excess moisture evaporation.

Choose a well-draining loamy soil mix for repotting Inula helenium. This type of soil provides the perfect balance of moisture retention and drainage, allowing excess water to escape easily and preventing root rot. A bit of added sand or perlite will enhance drainage capacity.