Campanula rhomboidalis
Campanula rhomboidalis · Campanulaceae
The gardener's calendar
Ideal time to plant campanula rhomboidalis: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Rhomboid Bellflower
- Family
- Campanulaceae
- Type
- Perennial herb
- Adult height
- 30 to 60 cm
- Foliage
- Deciduous, light green
- Flowering
- June to August, blue-violet flowers
- Hardiness
- Very hardy, down to -20°C
- Origin
- Alps and Pyrenees
Care
Light exposure
Campanula rhomboidalis thrives in full sun or partial shade. Choose a sunny location for more generous flowering and more compact plants. It tolerates lightly shaded areas well, especially in warm climates.
Watering
Water regularly during the growing season (spring-summer), keeping the soil moist but not waterlogged. Reduce watering in autumn and winter. Avoid excess stagnant moisture which promotes rot.
Soil
Prefer well-drained, light and fairly fertile soil. A substrate rich in organic matter is ideal. This bellflower appreciates slightly chalky soils but adapts to ordinary well-structured garden soil.
Fertilizing
A balanced fertilizer application in early spring is generally sufficient. Moderate fertilizing every 4 to 6 weeks during the active growing period can stimulate flowering. Avoid excess nitrogen which promotes foliage at the expense of flowers.
Pruning and cutting
Remove faded flowers regularly to encourage prolonged flowering. Cut back the plant lightly after flowering to maintain a compact shape. Clean up dead stems in late winter to prepare for spring growth.
Diseases and pests
This plant is generally robust and rarely subject to serious diseases. Watch for slugs and snails in spring. Overly moist soil can promote root rot; ensure optimal drainage.
Did you know?
Campanula rhomboidalis is native to alpine and subalpine meadows, where it naturally grows in spectacular colonies during summer months. Its distinctive rhomboid leaves gave it its scientific name. The bellflower has been used since antiquity in traditional herbal medicine in mountain regions, though it is primarily valued as an ornamental flower by botanically minded gardeners.
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
- Peach-leaved bellflowerCampanula persicifolia
- Clustered bellflowerCampanula glomerata
- Trailing bellflowerCampanula poscharskyana
- Dalmatian bellflowerCampanula portenschlagiana
- PānakenakeLobelia angulata
- Carpathian bellflowerCampanula carpatica
Tips generated and checked by Viridia — adapt them to your local climate.