Carlina acaulis SILVER THISTLE (10 seeds)

Silver carline, also known as stemless carline thistle, is a perennial plant from the Asteraceae family, typically found in mountainous regions. This alpine thistle has a tough, glossy appearance, reaching about 10 cm in height and 30 cm in width.

Its foliage consists of long, thick, gray-green leaves that are sometimes slightly hairy. They form a compact rosette at the base, creating a dense carpet that serves as a backdrop for the flowers. The leaves have slightly serrated edges and a rough texture.

The silvery flowering is spectacular, featuring large flower heads resembling daisies, with a brown central disc and white or cream-colored rays. Flowering occurs in summer, usually in June and July, and can last for several weeks. Interestingly, the flower closes when the weather is humid or rainy; this phenomenon is traditionally used as a natural barometer to predict short-term weather changes.

Silver carline seeds come from Carlina acaulis species. They are thin, very light, and are dispersed by the wind once the flowering period has ended.

- Uses:

- Germination and Sowing:

• The best time to sow stemless carline thistle seeds is during the winter, from December to February.
• Begin by stratifying the seeds for 3 months in the refrigerator, or naturally by leaving them outside during winter.
• Prepare pots using finely sifted garden soil.
• Bury the seeds 1 cm deep, leaving the "volant" (seed wing) protruding.
• Water gently using a spray bottle.
• Place the culture in a location with a temperature between 10°C and 15°C.
• Germination typically begins one to two months after the stratification process is complete.

- Soil Type:

The substrate must be well-drained, poor, sandy, or gravelly, with very little organic matter. It tolerates limestone soils but dislikes stagnant moisture.

- Exposure:

This plant requires high light levels to thrive. it loves sunny spots where it receives direct light for most of the day, which encourages compact growth and beautiful blooms.

- Temperature & Hardiness:

Carlina acaulis is perfectly adapted to temperate climates and can withstand extreme cold, including heavy frosts down to -25°C.

- Watering:

Water intake should be moderate, primarily during prolonged dry spells. Otherwise, it is best to let the soil dry out between waterings to prevent root rot.

- Propagation:

Multiplication is mainly done by dividing clumps in the spring or autumn. Sowing seeds is also an effective method.

- Pests and Diseases:

The plant is generally resistant to pests. However, it can occasionally be attacked by insects such as aphids or scale insects, especially if the plant is stressed or kept in poor growing conditions.