Rough star thistle (Centaurea sphaerocephala)

Rough star thistle

Rough star thistle is one of over 400 species belonging to the daisy family. It possesses a highly distinctive appearance of spiky seedheads and pointed purple petals. Gardeners typically plant rough star thistle in rock gardens and containers.

Scientific classification

Species

Rough star thistle (Centaurea sphaerocephala)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

50 cm

Plant Height

Purple

Flower Color

Semi-evergreen

Leaf type

20 - 35 ℃

Ideal Temperature

Images of Rough star thistle

Distribution of Rough star thistle

Distribution Map

Rough star thistle is naturally found in the Mediterranean Basin, specifically within the southern parts of Europe. Its range encompasses major regions of southwestern Europe. Over time, rough star thistle has spread beyond its native territory but details on its introduced range are not specified.

Native

Cultivated

Invasive

Introduced

No species reported

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Care Guide for Rough star thistle

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Originating from arid regions, rough star thistle exhibits high drought tolerance, storing moisture efficiently. It thrives outdoors in well-draining soil, mimicking its native habitat. For optimal growth, rough star thistle requires weekly watering to maintain balance, accommodating its adaptation to infrequent rainfall.

Fertilize: For optimal growth, rough star thistle requires a balanced NPK fertilizer monthly during active growth. Adjust frequency seasonally and use caution to prevent overapplication. A slow-release formula is recommended to ensure steady nutrient supply, promoting healthy growth and abundant flowering.

Pruning: Rough star thistle flourishes with regular pruning, ideally from early to late spring. Remove old stems to boost growth and flowers, using clean tools to avoid disease. This enhances air circulation, overall health, and manages invasive tendencies, supporting robust and attractive growth.

Propagation: Rough star thistle thrives through stem cutting propagation, utilizing its hardiness. Select a healthy segment with two leaf nodes and consider rooting hormone. Plant in well-draining soil, maintain even moisture, and ensure indirect light and moderate temperatures for optimal growth.

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