Field sow-thistle
Sonchus arvensis · Asteraceae
The gardener's calendar
Ideal time to plant field sow-thistle: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, medium green
- Flowering
- June to September, golden yellow flowers
- Mature size
- 60 to 120 cm tall
- Growth
- Fast
- Hardiness
- Very hardy, down to -15 °C
- Origin
- Temperate Europe and Western Asia
- Soil type
- Undemanding, tolerates poor and compacted soils
Care
Watering
Sow thistle tolerates drought well once established. Occasional watering during active growth is sufficient, except during prolonged heat waves. Reduce watering as autumn approaches.
Exposure
Choose a sunny spot to encourage abundant flowering. The plant also tolerates partial shade, but flower production will be less generous.
Pruning and cutting
Cut back the plant in late winter or early spring to promote a compact, bushy habit. Regularly remove spent flowers to prolong blooming and prevent unwanted self-seeding.
Soil
Sow thistle adapts to most soils, even poor or compacted ones. Well-draining soil is preferable to prevent root rot in winter. Organic matter amendments are not strictly necessary.
Fertilizer
Undemanding, it generally requires no nutritional input. In very depleted soil, a light application in spring can support growth, but the plant thrives with minimal feeding.
Diseases and pests
Sow thistle is robust and rarely affected by diseases. Watch for slugs and snails in spring. Excess moisture and stagnant conditions can promote root rot; ensure good drainage.
Did you know?
Sow thistle is a highly melliferous plant greatly appreciated by bees and butterflies. Historically, some parts were eaten in salads in European countryside areas, but the plant gradually acquired a reputation as a weed from the 19th century onwards with the intensification of agriculture.
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.