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Helichrysum italicum, a tall Italian everlasting

Helichrysum italicum, italian everlasting
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Narrow, silver-grey evergreen leaves that smell almost exactly of curry, topped in summer by globes of flashy bright yellow flowers on tall upright stems: that is the Italian everlasting, grown as much for scent as for bouquets that keep their colour for years. Give it full sun and sharp drainage, and it asks for almost nothing else.

Helichrysum italicum at a glance
Botanical name Helichrysum italicum, Helichrysum angustifolium
Common names Italian everlasting, Curry plant
Family Asteraceae, Compositae
Type perennial plant
Height 24 inches (60 cm)
Exposure full sun
Planting density 1 to 2 per square yard (m²)
Soil More on the light side, well drained, pH neutral to alkaline
Hardiness not very hardy
Flowering summer
Foliage Evergreen

All its names bear witness to just how surprising this plant can be, whether for its unusual silver foliage or its fragrant-smelling flowers.

Getting to know Helichrysum italicum

The Italian everlasting is a bushy upright sub-shrub. It unfurls masses of silver-gray leafage that is evergreen and very narrow. Its linear leaves have a special characteristic: they’re very fragrant, and the smell they release is nearly identical to that of curry. This gave the plant one of its many common names, the “curry plant”.

Come summer, flowers open up at the tip of tall white upright stems. Each globe-shaped flower is a flashy bright yellow, and they’re clustered together in oblong heads called capitulums.

Brush the leaves as you walk past: the curry scent is strongest in warm sun.

Despite the smell, this plant is no relation to the curry spice blend and contains none of its ingredients, so treat it as an aromatic rather than a seasoning.

A sprig can be steeped in oil, soups or stews for its aroma, but lift it out before serving because the leaves stay tough and turn bitter.

Left unpruned, the bush forms a rounded mound that is often broader than it is tall, and with age its base gradually becomes woody and bare of foliage.

Planting the curry herb

In order for it to thrive in proper growing conditions, Helichrysum italicum should be cultivated in rather dry and poor soil. Drainage is important because Italian Everlasting hates excess moisture. The plant copes quite well with chalky and alkaline soil types, but it doesn’t like acidic pH.

Best exposure for Helichrysum italicum
Warm sun, sheltered from cold drafts, suits it best

As for exposure, favor warm, sunny spots, and if possible, make sure it’s sheltered from cold drafts if ever your garden is prone to them. Finally, make note of the low hardiness of Helichrysum italicum , meaning you’ll have to plant this one in spring. Regarding the planting, normally one or two specimens of your curry plant will comfortably cover a square yard or meter.

Once you’ve chosen the right spot:

  • Dig a hole about 4 to 8 inches (10 to 20 cm) deep.
  • If ever you’ve got heavy soil, don’t dither: lavishly amend the soil by adding sand or wood ash to lighten it up somewhat.
  • Pull the plant out of its pot and break the clump up to free a few of the roots that were cramped inside. Do this delicately so that you don’t break them.
  • Place the plant in the hole, and backfill it, pressing the soil down around the roots.

Helichrysum italicum in a pot

Potted growing for Italian everlasting
Shallow pots are fine, drainage is not negotiable

Potted Helichrysum italicum is a great idea. It doesn’t need very deep soil, but excellent drainage is required. Remember that the plant isn’t very hardy, but it will also easily sprout back from seed if you let them develop. Make sure a few fall to the ground in the pot.

Help the plant resist a few degrees colder by protecting it with fleece or bringing it to shelter.

Caring for Helichrysum italicum

The curry plant doesn’t call for much care. It resists drought, so you won’t need to water it, and deadheading of wilted flower scapes and broken or damaged stems is only required in spring. Harsh winters should lead to protect the base of the plant with a thick layer of mulch.

Multiplying and propagating Helichrysum italicum

Propagation of a specific Italian Everlasting specimen is typically done through semi-hardened cuttings, either at the end of spring or at the end of summer. What matters most is that the weather is warm at the start.

Diseases and pests

Blooming and foliage both resist pests well
Essential oils keep leaf-eating insects off the foliage

It’s pretty well established that pests are completely uninterested in foliage of Helichrysum italicum, but when it comes to diseases, it’s another thing altogether: in case of hot and wet summers, it’ll probably contract mildew. Leaves are the part that is mostly affected in this case, and it’s usually harmless for the plant’s health.

Did you know… ? Thanks to the high amount of essential oils, Helichrysum italicum is naturally protected against leaf-eating insects.

Landscaping and uses of Italian Everlasting

The curry plant comes in handy in a great many situations:

Ball of trimmed helichrysum italicum
At home in rock gardens, beds, walls and edges

For gardens that are planted in areas with harsher winters, plant Helichrysum italicum in flower beds as an annual. As for which companion plants are best for Italian Everlasting, the list is long: just select plants that can take the same growing environment, such as Sedum, Cystus, Gazania, French marigold, rudbeckia, etc.

Dried helichrysum italicum flower stalks
Cut stems keep their colour for years indoors

Helichrysum italicum is one of the favorites for people who love making dried flower bouquets.

Its flowers will last for years and are perfect for decorating a beautiful piece of furniture.

For these projects, you can also grow hydrangea, bunny’s tail, goldenrod, poppy pods…


Images: CC BY 2.0: K M, Denis Bourez, Pixabay: Blandine Joannic, Goran Horvat, Hans Braxmeier, Solfaroli Renzo

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.