Dyer's sawwort
Serratula tinctoria · Asteraceae
The gardener's calendar
Ideal time to plant dyer's sawwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- July to September
- Adult size
- 60 to 100 cm tall
- Growth
- Moderate
- Hardiness
- Very hardy (down to -15 °C)
- Origin
- Temperate Europe
- Soil type
- Well-drained, tolerates chalky soils
Care
Light exposure
Position your serratula in full sun or partial shade for optimal flowering. It tolerates slightly shaded spots but will flower more generously in a bright location.
Watering
Water moderately during the growing season, especially during prolonged dry spells. Once established, the plant is quite drought-tolerant. Avoid excess moisture which could promote root rot.
Soil
Serratula prefers well-drained soil, even poor or stony soil. It adapts well to chalky soils and tolerates dry ground. A light addition of organic matter at planting time is sufficient to get the plant off to a good start.
Fertiliser
Fertilising is generally not necessary. Moderate soil enrichment at planting time is enough to establish the plant. Excess nitrogen encourages foliage at the expense of flowering.
Pruning
Cut back faded stems after flowering to encourage better structure and promote compact branching. In late winter, remove any dried stems. This plant doesn't require strict pruning and only needs routine tidying.
Diseases and pests
Serratula is generally very hardy against diseases. In excessively humid conditions, watch for root rot or rust attacks. Good drainage and air circulation minimise these risks.
Did you know?
Serratula tinctoria owes its scientific name 'tinctoria' to its historical use: its yellow flowers and roots were once used to dye fabrics yellow and blue in medieval European dye workshops. This plant was a precious resource for the textile industry before the arrival of synthetic dyes.
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.