Polygala amarella
Polygala amarella · Polygalaceae
The gardener's calendar
Ideal time to plant polygala amarella: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Polygalaceae
- Type
- Perennial herb
- Flowering
- June to September
- Flower color
- Blue, violet or pink
- Adult size
- 15 to 40 cm in height
- Foliage
- Deciduous
- Hardiness
- Very hardy (down to -15°C)
- Origin
- Central and Western Europe
Care
Light and exposure
Polygala amarella thrives in full sun or partial shade. It appreciates a sunny position for at least 4 to 6 hours a day for abundant flowering. It tolerates partially shaded areas in warm climates.
Soil type
Prefers well-draining, light, and slightly acidic to neutral soils. Fears waterlogging and overly clayey soils. Poor or chalky substrate poses no problem; this is an undemanding plant.
Watering
Water moderately, especially during the growth and flowering period. Let the soil dry out partially between waterings. In winter, reduce watering as the plant goes dormant.
Fertilizer and nutrition
Polygala amarella is not very demanding. A balanced fertilizer application in spring is more than enough. Avoid excess nitrogen, which would promote foliage at the expense of flowering.
Pruning and maintenance
Prune lightly after flowering to maintain a compact shape and encourage branching. In late winter, remove dried or damaged stems. Gentle pruning is sufficient; this plant does not require drastic intervention.
Diseases and pests
Very robust, it is rarely attacked. Watch for excessive moisture that can cause rot. Fungal problems remain exceptional under correct conditions.
Did you know?
Polygala amarella is also known by the common name 'Bitter Milkwort': its scientific name 'amarella' literally means 'little bitter'. Once upon a time, this plant was used in traditional herbal medicine in Central Europe, particularly for its supposed beneficial properties for the respiratory system. It remains a charming botanical curiosity of lean meadows and chalky areas across the continent.
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
- Common milkwortPolygala vulgaris
- Polygala serpyllifoliaPolygala serpyllifolia
- Polygaloides chamaebuxusPolygaloides chamaebuxus
- Tufted milkwortPolygala comosa
- Chalk milkwortPolygala calcarea
- Myrtle-leaved milkwortPolygala myrtifolia
Tips generated and checked by Viridia — adapt them to your local climate.