Centranthus calcitrapae
Centranthus calcitrapae · Caprifoliaceae
The gardener's calendar
Ideal time to plant centranthus calcitrapae: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Acid-loving Centranthus
- Family
- Caprifoliaceae
- Type
- Perennial herb
- Flowering
- April to July
- Mature height
- 30 to 60 cm
- Foliage
- Deciduous
- Hardiness
- Good, down to -15 °C
- Origin
- Mediterranean region
Care
Light Exposure
Choose a location in full sun or partial shade to encourage abundant flowering. Centranthus calcitrapae appreciates well-lit areas with at least 6 hours of sunlight daily. A south or west-facing exposure is ideal in temperate regions.
Soil and Drainage
This species prefers well-drained, light soil that is poor to moderately fertile. It tolerates chalky and rocky soils, making it particularly well-suited for dry gardens. Improve drainage with sand or gravel if your soil retains too much moisture.
Watering
Water regularly during the growing and flowering period, letting the soil dry out slightly between waterings. Once established, the plant is drought-tolerant. Reduce watering in winter and keep it to the bare minimum.
Pruning and Maintenance
Remove spent flowers regularly to extend the flowering period. In late winter or early spring, cut the plant back to 10-15 cm above the ground to encourage a well-branched and denser clump.
Fertilization
A moderate application of balanced fertilizer in spring is more than sufficient. In poor soil, you can enrich with well-decomposed compost or slow-release fertilizer. Avoid excess nitrogen, which reduces flowering.
Pests and Diseases
Very robust, Centranthus calcitrapae mainly fears excess moisture, which promotes root rot. In hot, dry conditions, watch out for spider mites. Good air circulation and controlled watering prevent most problems.
Did you know?
Centranthus calcitrapae is prized by Mediterranean gardeners for its remarkable ability to flower generously on the poorest and rockiest soils. Its name precisely reflects this affinity: it means "spur that loves chalky rock." Historically, this plant was used to stabilize and beautify embankments and old rocky walls in mountainous regions.
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
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- Himalayan honeysuckleLeycesteria formosa
- Involucred honeysuckleLonicera involucrata
Tips generated and checked by Viridia — adapt them to your local climate.