Lathraea squamaria
Lathraea squamaria · Orobanchaceae
The gardener's calendar
Ideal time to plant lathraea squamaria: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Orobanchaceae
- Plant type
- Parasitic herbaceous plant
- Flowering
- Spring (March to May)
- Adult size
- 15 to 30 cm in height
- Foliage
- Deciduous, reduced to scales
- Hardiness
- Very hardy (down to -15°C)
- Origin
- Central and western Europe
- Particularity
- Obligate parasite of hazel and alder roots
Care
Light exposure
Toothwort naturally develops in shaded woodland, sheltered from direct sunlight. It appreciates partially shaded areas, under the cover of host trees or shrubs. Avoid sunny exposures that disrupt its parasitic cycle.
Soil and substrate
This parasitic plant requires proximity to host roots (hazel, alder) to survive. Rich, moist and well-draining soil promotes the development of its hosts. Forest humus is ideal for recreating natural conditions.
Watering
Keep the soil moist but not waterlogged during the growing period. Regular watering in spring supports flowering. During dormancy, reduce watering without allowing the substrate to dry out completely.
Pruning and maintenance
No pruning is necessary. Let the plant develop naturally according to its parasitic cycle. Remove only dead parts after flowering.
Fertilizer
No fertilizer is essential. Toothwort derives its nutrients from its hosts. A very modest application of rich compost can indirectly support the vitality of host roots, but proceed cautiously.
Diseases and pests
This plant is generally robust and rarely affected by pests. The main risk is weakening or death of the host (hazel or alder), which would cut off its supply. Watch over the health of companion shrubs.
Did you know?
Toothwort is a fascinating parasite that clings to hazel or alder roots to draw sap and nutrients. Contrary to popular belief, it does not systematically kill its host: it establishes a relatively balanced parasitic relationship. In old-growth forests, its spring presence is an indicator of the ecological balance of the environment.
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
- Meadow cowwheatMelampyrum pratense
- Yellow rattleRhinanthus minor
- Pedicularis palustrisPedicularis palustris
- Melampyrum sylvaticumMelampyrum sylvaticum
- Red bartsiaOdontites vernus
- Marsh lousewortPedicularis sylvatica
Tips generated and checked by Viridia — adapt them to your local climate.