Red star-thistle (Centaurea calcitrapa)
Care, watering, light and tips for Red star-thistle on Floravia.
Quick facts
- Family: Asteraceae
- Difficulty: Easy to care for
- Watering: every 3 days
- Light: Full sun
- Temperature: 0–35 °C
- Toxicity: Toxic to pets
About Red star-thistle
Centaurea calcitrapa, commonly known as purple starthistle, is an annual or biennial herbaceous plant belonging to the Asteraceae family. It is characterized by its branched, spiny stems and its purple or pink flowers that bloom in summer. It is ideal for low-maintenance gardens, rockeries, or naturalized areas where a wild touch is desired.
Native range
Mediterranean region of Europe, Asia, and North Africa.
Care tips
This plant thrives in full sun and well-drained soils, even poor or calcareous ones, as it is very drought tolerant. Watering should be infrequent once established, only during prolonged dry spells. Avoid overwatering and waterlogged soils, as this can lead to root rot. It does not require regular fertilization.
How to save a dying Red star-thistle
- Warning signs
- Wilted or yellowing leaves, soft and drooping stems, lack of flowering or dry flowers.
- First aid
- Check drainage, remove competing weeds, and ensure full sun exposure. Water moderately.
- What kills it
- Overwatering (rots roots) or constant shade (weakens and doesn't flower).
- Can it be saved?
- Yes, if roots are not completely rotted and it gets sun and good drainage in time.