Red bartsia
Odontites vernus · Orobanchaceae
The gardener's calendar
Ideal time to plant red bartsia: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Odontites vernus
- Family
- Orobanchaceae
- Form
- Annual herbaceous
- Flowering
- Summer to autumn (July-October)
- Adult size
- 20-60 cm in height
- Growth
- Fast
- Hardiness
- Annual, low frost tolerance
- Origin
- Europe, Western Asia
Care
Light exposure
Red odontites prefers sunny to partially shaded locations. It adapts well to open, exposed areas where it receives at least a few hours of direct light. Overly shaded situations slow down its flowering.
Soil type and preparation
This plant tolerates a wide range of soils, from poor to moderately fertile. It naturally grows in dry, well-drained areas, even chalky ones. Avoid stagnant moisture excess which could promote root rot.
Moderate watering
Water regularly but moderately, ensuring the soil dries slightly between waterings. Once established, red odontites tolerates relative dryness well. During rainy periods, reduce watering to prevent waterlogging.
Light fertilizing
Fertilizer is not essential; this plant thrives in poor soils. A light application of balanced fertilizer at the start of the season is enough if the soil is particularly depleted. Avoid excess nitrogen which promotes foliage at the expense of flowering.
Pruning and maintenance
Pinch young plants to encourage branching and a more compact shape. Deadhead spent flowers regularly to extend flowering. At the end of the season, leave a few flowers to develop seeds if you want self-seeding the following year.
Pests and diseases
Red odontites is generally robust and rarely affected by diseases. Watch for powdery mildew in humid, stagnant conditions. Good drainage and air circulation are sufficient to prevent most fungal problems.
Did you know?
Red odontites owes its scientific name to the Greek 'odous' (tooth) referring to the shape of its toothed sepals. In the past, this plant was believed to be beneficial for dental health in European folk medicine, although these properties have never been scientifically validated.
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.