Yellow Restharrow
Ononis natrix · Fabaceae
The gardener's calendar
Ideal time to plant yellow restharrow: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Fabaceae (legumes)
- Form
- Herbaceous
- Flowering
- June to September
- Adult size
- 30 to 60 cm in height
- Foliage
- Deciduous
- Hardiness
- Hardy (down to -10 °C approximately)
- Exposure
- Full sun
- Origin
- Mediterranean region and Southern Europe
Care
Exposure
Ononis natrix requires full sun exposure to flower generously and develop a compact structure. It tolerates partial shade poorly, which reduces flowering. Plant it in a sunny, well-lit location.
Soil and drainage
This plant prefers well-drained, light, and even chalky or gravelly soils. It adapts well to poor, lean soils. Avoid overly moist or compacted soils that promote root rot.
Watering
Water moderately during the growing and flowering period, once or twice a week depending on the climate. Once established, Ononis natrix is very drought-tolerant. Allow the soil to dry slightly between waterings. In winter, drastically reduce watering.
Fertilizing
As a legume, this plant fixes atmospheric nitrogen through root bacteria. A balanced fertilizer application in spring is more than enough. Avoid excess nitrogen, which promotes foliage at the expense of flowering.
Pruning
Prune lightly after flowering to maintain a compact shape and remove dried stems. A rejuvenating pruning in late winter regenerates overgrown plants. Avoid severe pruning that can weaken the plant.
Pests and diseases
Ononis natrix is generally resistant to diseases if drainage is good. In case of excessive moisture, root rot may occur. Few specific pests target it. Ensure good air circulation to prevent fungal issues.
Did you know?
Ononis natrix, known as Restharrow in English, owes its curious name to its extremely powerful and deep root system, capable of blocking plows during agricultural work. Mediterranean farmers considered it a real foe in their fields, hence this colorful nickname! It also produces yellow flowers striped with red that are particularly decorative.
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.