Gentiana clusii
Gentiana clusii · Gentianaceae
The gardener's calendar
Ideal time to plant gentiana clusii: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Gentianaceae
- Type
- Perennial herb
- Flowering
- July to September
- Flower color
- Intense blue to blue-violet
- Adult size
- 10 to 30 cm in height
- Foliage
- Evergreen, dark green
- Hardiness
- Very hardy (down to -20°C)
- Origin
- Alps and Carpathians
Care
Light exposure
Plant your Clusius Gentian in full sun or light partial shade to achieve generous flowering. In mountains or cool climates, full sun promotes the most intense colors. In warm regions, afternoon shade will protect it from water stress.
Soil
This plant requires well-draining soil, slightly acidic to neutral, rich in organic matter. Choose a gravelly-sandy substrate to prevent root suffocation. A mineral mulch (gravel) helps retain moisture and mimics its mountain habitat.
Watering
Water regularly during the growing season and flowering, keeping the substrate moist but never waterlogged. Reduce watering in winter. Prefer soft water or rainwater; hard water can gradually cause problems.
Fertilizing
Apply a balanced fertilizer (NPK) once in spring, or use slow-release fertilizer for mountain plants. Avoid excess nitrogen, which weakens the plant and reduces flowering. A single application per year is generally sufficient.
Pruning and maintenance
No mandatory pruning needed. Simply remove spent flowers to encourage prolonged blooming and dead stems after winter. Clean the evergreen foliage in late winter to remove debris.
Diseases and pests
Clusius Gentian is generally robust. Watch for powdery mildew in cases of stagnant humidity and heat. Good air circulation and impeccable drainage prevent most fungal problems. Slugs may damage young shoots in spring.
Did you know?
Clusius Gentian is named after botanist Carolus Clusius (Charles de l'Écluse), a 16th-century Flemish humanist who was among the first to document the botanical wealth of the Alps. This small mountain gem long symbolized traditional alpine medicine, though it was actually the Yellow Gentian (Gentiana lutea) that was historically exploited.
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
- Marsh gentianGentiana pneumonanthe
- Yellow gentianGentiana lutea
- Blackstonia perfoliataBlackstonia perfoliata
- Field gentianGentianella campestris
- Willow gentianGentiana asclepiadea
- Spring gentianGentiana verna
Tips generated and checked by Viridia — adapt them to your local climate.