Coronilla glauca
Coronilla glauca · Fabaceae
📷 Christian Ferrer · CC BY 4.0
⚠️ Feuilles contiennent cardioglycosides ; toxiques pour chiens/chats par ingestion ; enfants à risque de troubles cardiaques.
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around coronilla glauca and prepare for winter.
ID card
- Foliage
- Evergreen, glabrous and glaucous (bluish appearance)
- Flowering
- March to May, yellow flowers in small clusters
- Adult size
- Approximately 1.5 to 2 m in height
- Growth
- Moderate to fast
- Hardiness
- Low hardiness (frost-sensitive below −5 °C)
- Origin
- Mediterranean regions and North Africa
- Soil type
- Well-drained, chalky, low fertility
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Coronilla glauca flowers more abundantly when kept slightly tight: water only during actual dry spells. Light pruning after flowering (May) thickens it without trauma.
The common mistake
Watering it regularly like a typical ornamental: it becomes soft, flowers poorly, and can rot in winter.
The pro's trick
Feed it very lightly in pots with wood ash in autumn: alkaline elements strengthen the foliage and subtly boost spring flowering.
Care
Watering
Moderate and regular watering during growth (March to September), particularly the first two years. Once established, coronilla glauca is highly drought-tolerant. In containers, allow to dry slightly between waterings. Avoid excess moisture which promotes root rot.
Light exposure
Place this plant in full sun, ideally in a location sheltered from cold winds. It needs at least 6 hours of direct light daily for abundant flowering and compact growth. In very hot regions, light afternoon shade may be tolerated.
Soil
Choose well-drained substrate, even poor or chalky soil. Coronilla glauca dislikes heavy and wet soils. If planting in containers, use a light mix with pumice or gravel. Adding coarse sand improves drainage in heavy soil.
Pruning and cutting
Prune lightly after flowering (late May) to maintain a bushy and dense form. Remove dead or diseased branches. Avoid severe pruning which takes several seasons to recover from. Light pruning maintains natural shape and encourages branching.
Fertilizing
Undemanding, coronilla glauca requires only moderate fertilizing. A balanced diluted fertilizer once in spring is sufficient. Like all Fabaceae, it can fix atmospheric nitrogen; excessive enrichment can reduce flowering.
Diseases and pests
Generally hardy, it may be affected by scale insects or spider mites in dry air. Powdery mildew rarely appears with good air circulation. Improve ventilation and check foliage regularly to intervene early if problems occur.
Did you know?
Coronilla glauca owes its name to the glaucous (blue-grey) tint characteristic of its leaves, which results from a fine waxy coating protecting the plant against Mediterranean drought. In the nineteenth century, it was highly valued in English and Victorian gardens as a conservatory plant, before becoming an essential feature of modern dry gardens.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.