Spiny plumeless thistle
Carduus acanthoides · Asteraceae
The gardener's calendar
Ideal time to plant spiny plumeless thistle: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, grayish-green, very spiny
- Flowering
- July to September, purple to violet flowers
- Mature size
- 60 to 150 cm in height
- Growth
- Fast, biennial or annual cycle
- Hardiness
- Very hardy, tolerates temperate and continental climates
- Origin
- Europe, Mediterranean basin and Western Asia
- Soil type
- Well-drained, stony soils, tolerant of poor environments
- Exposure
- Full sun
Care
Watering
Spiny thistle is very tolerant of drought once established. Water moderately at planting time and during active growth periods, then reduce watering. This plant dislikes stagnant moisture.
Exposure
Place spiny thistle in full sun to promote abundant flowering and optimal vigor. It tolerates hot, windy exposures typical of its natural habitats.
Pruning and cutting
Remove spent flowerheads to extend flowering and prevent uncontrolled seeding. Wear thick gloves when handling due to sharp spines. Drastic pruning is generally unnecessary.
Soil and drainage
Spiny thistle prefers well-drained, poor to moderate, and somewhat chalky soils. It adapts to rocky or sandy substrates. Overly rich and moist soil promotes root rot.
Fertilizer
This robust thistle doesn't require regular fertilizer applications. Moderately fertile soil is entirely sufficient. Avoid excess nitrogen, which would promote vegetative growth at the expense of flowering.
Diseases and pests
Spiny thistle is very resistant to diseases and pest attacks thanks to its spines and robustness. Monitor excess moisture to prevent root rot. It's an undemanding plant in terms of phytosanitary care.
Did you know?
Spiny thistle was once used as a natural defense around enclosures and fields in rural Europe. Its fearsome spines made it impassable, hence its use as a living fence. In traditional phytotherapy, certain parts of thistle were utilized, though only preparations from well-defined roots and aerial parts have documented uses.
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.
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Tips generated and checked by Viridia — adapt them to your local climate.