Thysselinum palustre
Thysselinum palustre · Apiaceae
The gardener's calendar
Ideal time to plant thysselinum palustre: 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
- 80 to 150 cm in height
- Growth
- Fast
- Hardiness
- Hardy, down to -15°C
- Origin
- Temperate and boreal Europe
- Soil type
- Moist to wet, peaty
- Exposure
- Partial shade to shade
Care
Watering
Thysselinum palustre is a plant of moist and marshy environments: keep the soil constantly moist or even slightly flooded during the growing season. Water regularly in summer and reduce after flowering. A soil that dries out is incompatible with its needs.
Exposure
Choose partial shade or light shade, particularly in warm regions. This umbelliferous plant tolerates humid and shaded environments around ponds or marshy areas very well. It can also tolerate direct sun in cool, moist climates.
Soil
Rich, organic, and very moist soil is essential. Enrich the soil with compost or potting soil before planting. Peaty, muddy, or constantly wet soils are perfect. Avoid any risk of compaction by mulching lightly.
Fertilizer
A spring application of organic-rich fertilizer is generally sufficient. Prefer well-decomposed compost or a balanced diluted fertilizer. Natural marshy environments naturally provide the necessary nutrients; don't overdo it with fertilization.
Pruning and maintenance
No pruning is necessary during growth. Cut back dry stems and faded flower clusters in autumn or late winter. This plant reproduces naturally and regulates itself in a good moist environment.
Diseases and pests
Thysselinum palustre is not very susceptible to common diseases if drainage and ventilation are good. Excess stagnant moisture can promote root rot: ensure good air circulation. Occasionally check for underground pests in moist environments.
Did you know?
Thysselinum palustre was used in traditional European pharmacopoeia for its supposedly tonic and diuretic properties. Its large white umbels remarkably attract pollinating insects, particularly hoverflies and small wasps, making it an essential plant in damp garden areas to promote biodiversity.
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.