Flaxleaf
Thesium linophyllon · Thesiaceae
The gardener's calendar
Ideal time to plant flaxleaf: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Flax-leaved Bastard-toadflax
- Family
- Thesiaceae
- Type
- Perennial herbaceous plant
- Adult height
- 30 to 60 cm tall
- Flowering
- May to July
- Foliage
- Deciduous, grey-green
- Hardiness
- Very hardy (-15°C and below)
- Origin
- Central and southern Europe
Care
Light exposure
Position your Bastard-toadflax in full sun or partial shade for optimal flowering. This plant appreciates well-lit, airy locations, away from the dense shade of trees. Generous light ensures compact growth and better flower production.
Soil and terrain
Bastard-toadflax thrives in poor, well-drained soils with a slight lime content. It tolerates dry, impoverished ground and doesn't require rich organic soil. Absolutely avoid heavy, clayey soils and constantly wet conditions that promote root rot.
Watering
Water moderately, especially during active growth. Once established, this plant is satisfied with natural rainfall and tolerates dry periods well. In pots, allow the substrate to dry between waterings.
Fertilizing
Bastard-toadflax needs no regular fertilizer, as it prefers poor soils. A very modest mineral application in spring is quite sufficient. Avoid rich fertilizers that might promote foliage growth at the expense of flowering.
Pruning and maintenance
Prune lightly after flowering to maintain a compact shape and encourage branching. Remove dry or damaged stems in late winter. This plant requires minimal intervention and naturally regulates itself.
Diseases and pests
Bastard-toadflax is generally very robust and rarely affected by disease. In overly wet soil, root rot may appear. Monitor drainage conditions and ensure good air circulation around the foliage.
Did you know?
Linophyllum Thesium is a semi-parasitic plant that establishes complex underground relationships with the roots of neighboring plants, from which it draws part of its nutrients. This little-known strategy makes it a singular host of European dry, chalky meadows, where it plays a discreet yet important role in maintaining ecosystem balance.
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
- Thesium alpinumThesium alpinum
- Thesium pyrenaicumThesium pyrenaicum
- Thesium divaricatumThesium divaricatum
- SageSalvia officinalis
- CamelliaCamellia japonica
- Pedunculate oakQuercus robur
Tips generated and checked by Viridia — adapt them to your local climate.