Species reference sheet / enquiry only
Colutea istriaBladder Senna
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The Colutea istria, or Bladder Senna, is a hardy deciduous shrub native to southern Europe and the Mediterranean region. It is prized for its ornamental, inflated seed pods that resemble small bladders and its bright yellow, pea-shaped flowers, which bloom in summer. Growing up to 2–4 meters tall, it is an attractive and adaptable plant for dry, well-drained soils and sunny locations.
This low-maintenance shrub is an excellent choice for erosion control, hedges, and naturalized plantings in drought-prone areas.
Specifications:
- Height: 2–4 meters
- Width: 1.5–3 meters
- Native to: Southern Europe, Mediterranean
- Foliage: Pinnate, light green leaves; deciduous
- Growth rate: Moderate
Conditions:
- Soil: Prefers well-drained, sandy, or rocky soils; tolerates nutrient-poor conditions
- Light: Full sun to partial shade
- Water: Low; highly drought-tolerant once established
- Climate: Thrives in temperate and Mediterranean regions
Additional Features:
- Flowers: Bright yellow, pea-shaped flowers bloom in summer, attracting pollinators
- Seed Pods: Unique, inflated, bladder-like seed pods that persist into autumn
- Uses: Ideal for hedging, erosion control, and as a feature in naturalized gardens
- Spacing: Plant 2–3 meters apart for hedges or standalone displays
- Low Maintenance: Requires little care; prune lightly after flowering to shape
- Pest Resistance: Naturally resistant to most pests and diseases
- Environmental Benefits: Supports pollinators and stabilizes soil in dry conditions
The Bladder Senna is a striking and versatile shrub, perfect for adding color, texture, and ecological value to drought-tolerant gardens and landscapes.
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