Centaurea spinosa Care
Centaurea spinosa
A silvery, thorny, cushion-forming shrub native to the Aegean coasts. It needs full sun and poor, well-drained soils; once established it should never be irrigated or fertilized, and it is excellent for dry gardens.
Monthly care calendar
Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.
- Watering: Not required; winter precipitation is sufficient.
- General care: None; leave the plant to itself.
- Pests & diseases: The only risk is root rot in soil where drainage is not excellent.
- Watering: Not needed; rainfall is sufficient.
- Watering: Not required, spring rainfall is sufficient.
- Fertilizing: Absolutely not needed. Fertilizing can kill the plant.
- General care: The plant slowly wakes up.
- General care: New shoots lengthen.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The plant enters summer dormancy, and its silvery color becomes even more pronounced.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- Watering: In midsummer, deep watering every 15-20 days is enough. Established plants (over 2 years old) do not need watering in most years. Water so that the soil is wetted to a depth of 10-15 cm from the surface.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The best time of year to plant a new seedling. It must be planted in a well-drained, sandy/gravelly site.
- Watering: Not required; autumn precipitation is sufficient.
- General care: With the rains the plant revives and prepares for winter.
- Watering: Not needed; rainfall is sufficient.
- General care: The plant is dormant.
- Pests & diseases: The only risk is the roots staying constantly in water in places with poor drainage.
The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.
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