Thesium divaricatum
Thesium divaricatum · Thesiaceae
The gardener's calendar
Ideal time to plant thesium divaricatum: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Thesiaceae
- Type
- Herbaceous
- Foliage
- Deciduous
- Flowering
- Spring to summer (April-July)
- Mature size
- 30 to 60 cm in height
- Hardiness
- Hardy, down to -15 °C
- Origin
- Europe, temperate regions
- Growth
- Moderate
Care
Light
Thesium divaricatum appreciates full sun to partial shade, ideally in a well-open location. Generous light promotes beautiful flowering and vigorous growth. Avoid overly shaded areas that would slow down development.
Soil and drainage
This plant prefers well-draining soil, rather dry to moist, with good permeability. It tolerates chalky and poor soils, characteristic of natural environments where it grows. Improve drainage with sand or gravel if your soil is too compact.
Watering
Water moderately during the growing season (spring-summer), letting the soil dry slightly between waterings. Once established, this plant tolerates drought well. Reduce watering significantly in autumn and winter.
Fertilizing
A modest annual application in spring is quite sufficient. A balanced or low-nitrogen fertilizer works better than a rich one. Thesium divaricatum, accustomed to poor soils, doesn't need abundant feeding.
Pruning and maintenance
This herbaceous plant requires only light tidying: remove dead or damaged stems in early spring. Moderate cutting back of spent stems encourages denser flowering and prolongs the plant's vigor.
Diseases and pests
Thesium divaricatum is rarely susceptible to diseases and pests when it benefits from good drainage. Excess winter moisture can promote root rot. Ensure proper aeration and avoid unnecessary watering during the cold season.
Did you know?
Thesium divaricatum is a particularly interesting plant because it is partially parasitic: its roots can attach to the roots of other plants to draw additional nutrients, while still being capable of living independently. This remarkable adaptation makes it a very hardy organism, able to colonize hostile and depleted environments where few plants thrive.
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.