Cirsium erisithales
Cirsium erisithales · Asteraceae
The gardener's calendar
Ideal time to plant cirsium erisithales: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Alpine Thistle
- Family
- Asteraceae
- Type
- Perennial herbaceous plant
- Adult height
- 60 to 120 cm
- Flowering period
- July to September
- Flower color
- Rose-lilac to purple
- Hardiness
- -15 to -20 °C
- Origin
- Alps and mountainous regions of Europe
Care
Exposure and light
Cirsium erisithales thrives in full sun or partial shade. Prioritize a sunny location for optimal flowering and a compact plant. It tolerates shaded areas but will become slightly etiolated.
Watering
Water regularly during the first year to establish a solid root system. Once established, the plant is fairly drought-tolerant. Avoid excess water which causes root rot, especially in winter.
Soil preparation
This plant adapts to many types of soil, preferably well-drained. It tolerates rocky, poor, and chalky soils, characteristic of its mountain habitat. No rich amendments are necessary.
Fertilizing
No fertilizer is essential for this robust perennial. A moderate application of compost in early spring is enough to support its growth. Avoid excess nitrogen which promotes foliage at the expense of flowering.
Pruning and maintenance
Remove faded flowers to extend flowering and limit self-seeding if desired. In late autumn or early spring, cut back dry stems to ground level. No major pruning is required.
Pests and diseases
This alpine plant is generally very healthy and little susceptible to pests. In very humid conditions, fungal diseases may appear. Ensure adequate drainage and avoid prolonged leaf wetness.
Did you know?
Cirsium erisithales is one of the rare thistle species with rose-lilac purple flowers rather than violet or yellow ones. This alpine perennial was long used in traditional medicine in mountainous regions for its supposed tonic properties, though this use has fallen into disuse. It naturally thrives between 600 and 2500 m elevation in the Alps, symbolizing the hardiness of mountain plants.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
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Tips generated and checked by Viridia — adapt them to your local climate.