Carduus olympicus Care
Carduus olympicus
A mountain plant endemic to Turkey and found only on Uludağ; it needs cold winters and cool summers. It cannot adapt to Izmir's hot, long summers and mild winters, so growing it in the garden is almost impossible and not recommended.
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: Instead of the deep winter cold it needs, mild and wet weather can cause root rot. Drainage must be excellent.
- Pests & diseases: Root and crown rot are the biggest risks.
- Frost risk: The plant is frost-hardy; the real problem is the lack of frost.
- General care: If the plant cannot complete its winter chilling period, it may fail to wake up or may grow very weakly.
- Pests & diseases: Check for root rot.
- Watering: If there is no rainfall, water very sparingly.
- Fertilizing: Absolutely not needed.
- Plant protection: Stressed new shoots can attract aphids.
- General care: As the weather warms, the plant begins to become stressed.
- Pests & diseases: It will be very sensitive to aphids and fungal diseases.
- Watering: Try to keep the soil dry.
- Plant protection: The risk of aphids and powdery mildew increases.
- General care: From this month onward, the plant begins to weaken due to heat stress.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: The plant's growth stops and it begins to decline.
- Pests & diseases: The plant is expected to die.
- 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 is not expected to tolerate summer heat in this climate.
- Pests & diseases: Heat stress and root rot kill the plant.
- 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.
- General care: The plant will be dead.
- 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.
- General care: The plant will be dead.
- Watering: In a long drought, water deeply once a month.
- Pruning: Regularly remove spent flowers at the base; this encourages new flowering.
- General care: Growing this plant in this climate has failed. If you try from seed, the seeds need to be placed in the refrigerator for cold stratification now.
- General care: If you are trying to grow from seed, keep the seeds in cold stratification in moist sand in the refrigerator.
- General care: Keep the seeds in cold stratification.
- General care: Keep the seeds in cold stratification. Sowing can be attempted in spring.
- Pests & diseases: The risk of root rot is always present.
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.
Want reminders for every plant in your garden? Our garden-care app with monthly task lists and frost alerts is currently available in Turkish; the English version is on the way.
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