Cylindrical Immortelle (Xeranthemum cylindraceum)

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Sunlight Requires full direct sunlight to produce abundant blooms; tolerates partial shade but will have reduced flowering

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Watering Drought-tolerant; water deeply only when the top 5 cm of soil is completely dry to avoid root rot

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Temperature Thrives in warm, dry conditions; tolerates light frosts but will die back after first heavy freeze

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Leaf: Narrow linear gray-green leaves covered in fine woolly hairs to reduce water loss
Flower: Papery cylindrical flower heads, typically white or pale pink with yellow central disc florets
Stem: Slender, branching stems with dense pubescence for drought tolerance

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Watering

Water deeply when soil is dry; reduce frequency during extended heatwaves to prevent overwatering

Fertilization

Apply a light, balanced granular feed at planting. Over-fertilization can reduce flower production and increase susceptibility to drought stress

Composted eggshell powder：Mix finely ground, fully dried eggshells into topsoil at planting to improve soil drainage and add calcium

Pruning

Deadhead spent flower heads regularly to encourage continuous blooming throughout summer
Trim leggy stems in mid-summer to maintain a compact, bushy growth form
Remove the entire plant after flowering to clear annual garden beds for winter

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats; non-toxic if ingested

Humans: No known toxic effects to humans; safe for handling and decorative use

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Culture: Symbolizes remembrance and enduring beauty, commonly used in dried funeral arrangements

Usage: Cut flower for dried floral displays; ornamental border plant in drought-tolerant gardens