Helichrysum angustifolium
Helichrysum angustifolium · Asteraceae
The gardener's calendar
Helichrysum angustifolium is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Common name
- Italian Immortelle
- Family
- Asteraceae
- Type
- Shrub
- Foliage
- Evergreen, fine and gray-green
- Flowering
- June to September, golden yellow flowers
- Adult size
- Approximately 60 cm tall
- Hardiness
- Down to approximately -10 °C
- Origin
- Mediterranean region
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Narrow-leaved Helichrysum is a must-have for drying: it thrives in poor, well-drained soil without fertilizer or excessive watering. Its yellow flowers dry naturally and stay perfect month after month.
The common mistake
Drowning it with water or enriching it with compost: it gets too bushy, becomes fluffy, and wilts at the first winter moisture.
The pro's trick
Sow it directly in place in spring in stony soil: it roots deep and becomes independent from day one.
Care
Light exposure
Italian Immortelle requires full sun exposure, at least 6 to 8 hours per day, to display its flowers and enhance the aroma of its foliage. Too shady a location would reduce flowering and promote etiolation. This Mediterranean plant thrives in warm, bright conditions.
Watering
Water moderately when planting, then let the substrate dry between waterings once established. Immortelle tolerates drought well and fears excess water, particularly in winter. Sparse watering during the cold period prevents root rot.
Soil
Choose light, well-draining soil, even poor or chalky soil. Regular potting soil mixed with sand or gravel works perfectly. Avoid heavy or constantly moist soils that would promote rot.
Pruning and maintenance
Prune lightly in late winter or early spring to maintain a compact, dense shape. Pinch back the tips of young stems in spring to encourage branching. You can harvest flowers at the start of blooming to dry and preserve them.
Fertilizer
No fertilizer is really necessary for this undemanding plant. A light application of balanced fertilizer in spring may suffice if the soil is very poor. Too much feeding risks weakening the aromatic concentration of the foliage.
Diseases and pests
Italian Immortelle is generally robust and rarely prone to disease. Ensure good drainage to prevent rot. In cases of excess moisture, a slight musty smell may appear; increase air circulation and reduce watering.
Did you know?
Italian Immortelle owes its scientific name Helichrysum to the Greek words 'helios' (sun) and 'chrysos' (gold), because its dried flowers retain their color and appearance for years without deteriorating. It has long been cultivated in the Mediterranean for its aromatic properties, with dried flowers used for decoration and leaves entering traditional remedies.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.