Xeranthemum Plant Growing & Care Guide for Gardeners

Article by Dean Ravenscroft, Ph.D. - Updated 25th Oct 2023

In this Gardener's HQ guide, we'll explore cultivating Xeranthemum plants in your garden, indoor spaces, and other settings.

Immortelle, and Everlasting Plant: Cultivation & Garden Use

The Xeranthemum genus of plants consists of hardy annuals that range in height from 60 to 90 cm (2 to 3 feet).

They have a silvery foliage, and bloom from the middle to end of summer when they carry leaves reminiscent of daisies; these may be pink or purple.

For a harmonious garden, consider pairing these showy plants alongside other drought-tolerant or Mediterranean plants such as Blue Fescue, Coneflower, Salvia, Perovskia, and Lavandula. For contrast, try Watsonia or succulents like Gold Moss Stonecrop, White Stonecrop, and other Sedums.

Xeranthemum plants are commonly known as Immortelle or Everlasting. They get this name because their dried flower heads retain their shape and color for a long time. Be aware that these plants are considered a weed or invasive in many areas.

Both photographs of Xeranthemum inapertum by Manuel M. Ramos under creative commons licence.

How to Grow Xeranthemum Immortelle

It is best to start off Xeranthemum indoors. Sow the seeds in peat pots about three weeks before the last frost of spring.

It should take about two weeks for Immortelle, Everlasting, and other Xeranthemum species to germinate at a temperature of 68°F (20°C).

Once growing, transplant the Immortelle seedling outdoors following the last frost at a spacing of 8 to 16 inches (20 to 40 cm).

Ideally Immortelle should be grown in a sunny part of the garden; the soil type is not too important.

Caring for Xeranthemum Plants

Xeranthemum plants are easy to grow and maintain as they are well-suited to dry soils. While they pretty much look after themselves, an occasional watering can benefit their growth and vitality.

The deadheading of spent blooms can encourage an extended flowering season. Although they are resilient plants, it is still a good idea to keep an eye out for common pests such as aphids or mealybugs.

Common Questions

How many members does the Xeranthemum genus have?

The Xeranthemum genus comprises about 20 species, often known as Everlasting flowers.

Do members of Xeranthemum make a good garden or landscaping plant?

Yes, Xeranthemum species, with their unique papery blooms, make attractive additions to borders and dried flower arrangements.

Which Xeranthemum species are most frequently grown by gardeners?

The most commonly grown species is Xeranthemum annuum, also known as Annual Everlasting or Immortelle.

Are members of the Xeranthemum plant genus fragrant?

Xeranthemum species are not typically known for their fragrance but rather for their long-lasting, paper-like blooms.

What is the perfect location to grow Xeranthemum?

Xeranthemum prefers a sunny location with well-drained soil. They're perfect for borders and are commonly used in dried flower arrangements.

Is Xeranthemum invasive in the USA, if so in which states?

Currently, Xeranthemum is not known to be invasive in the USA. Always refer to local regulations for accurate information.

How do I remove Xeranthemum plants from my garden?

To remove Xeranthemum, uproot the entire plant, ensuring all root material is removed to prevent regrowth.

Summary

The Xeranthemum genus, often referred to as Everlasting Flower or Immortelle, belongs to the Asteraceae family. It includes several species of annual plants native to the Mediterranean region.

Xeranthemum thrives in full sun and well-drained soil. It is typically grown from seeds sown in spring. The plants produce daisy-like flowers that dry well, maintaining their shape and color, hence the name "Everlasting Flower".

I hope that you enjoyed this guide on how to grow Xeranthemum plants. You may also enjoy the following guides on growing 'mums such as

Chrysanthemum and Mesembryanthemum plants.