Kennedia nigricans

Black Coral Pea

Botanical Name: Kennedia nigricans
Family: Fabaceae
Origin: Western Australia (Australian native)
Plant Type: Evergreen vigorous climbing or trailing vine

Overview

A bold and dramatic Australian native climber, Kennedia nigricans thrives in Adelaide’s Mediterranean climate and is known for its striking black-and-yellow pea flowers that appear from late winter through spring. Exceptionally tough once established, it handles heat, coastal winds, dry soils and low rainfall with ease. This fast-growing vine quickly covers fences, pergolas, arbours and embankments, making it a powerful option for screening or large-scale coverage. Its dark green trifoliate foliage forms a dense backdrop while the unusual bicoloured blooms create a distinctive, eye-catching display. Not fragrant, but lightly herbal when foliage is crushed. A resilient, low-maintenance native ideal for SA gardens needing quick coverage and bold visual impact.

Key Features

• Mature Size: Twining stems 4–6 m long (can reach 8+ m in ideal conditions); spread varies with support
• Growth Rate: 60–120 cm per year under good conditions (very fast)
• Foliage: Dark to mid-green, leathery trifoliate leaves; may bronze slightly in cold, dry or exposed conditions
• Flowers: Dramatic black-and-yellow pea flowers from late winter–mid spring; highly distinctive and prolific
  
• Fragrance: Flowers not fragrant; foliage mildly herbal when handled
• Seasonal Interest: Late winter and spring flowering provide a dramatic seasonal display; evergreen foliage gives dense coverage year-round
• Wildlife Value: Nectar and pollen attract native bees and beneficial insects; dense foliage offers shelter for small birds and lizards
• Tolerance: Very drought-tolerant once established; excellent heat tolerance; wind-tolerant; coastal-tolerant (second-line, sometimes first-line with good drainage); light frost hardy; tolerant of poor, sandy or limestone soils common across SA
• Planting Density: Climbers: 1 plant per 2–3 m along fences or structures; Groundcover use: 1 plant per 3–4 m²
• Pet Friendly: Generally considered non-toxic; ingestion of foliage may cause mild stomach upset

Where It Works Best

• Sunlight: Full sun to part shade (best flowering in full sun; tolerates shade once established)
• Soil: Free-draining sandy, loamy or limestone soils; tolerates poor soils; avoid prolonged waterlogging
• Water Needs: Establishment: 2 deep soaks/week for 8–12 weeks. Established: deep soak every 2-3 weeks in summer; minimal water required in winter
• Maintenance: Light prune after flowering to control growth and maintain shape; can be cut back harder in late winter if needed (avoid cutting into very old wood). Apply a light native fertiliser in early spring. Mulch annually
• Lifespan: 10–20+ years in ideal SA conditions
• Climate Zones: Excellent for Mediterranean and temperate SA — Adelaide Plains, coastal suburbs, Fleurieu, Barossa, northern suburbs and limestone-rich regions
• Soil pH: Neutral to alkaline; tolerates slightly acidic soils with good drainage

Landscape & Design Ideas

• Rapid screening along fences, pergolas, arbours or verandahs
• Coastal native gardens needing tough, fast coverage
• Large rockeries, banks or embankments for sprawling groundcover effect
• Dramatic flowering feature in native or bush-style landscapes
• Combine with Grevillea, Hardenbergia, Westringia, Banksia and Eremophila for cohesive native planting

Why You Will Love It

With its highly unusual black-and-yellow blooms and vigorous, drought-hardy growth, Kennedia nigricans is a standout native climber that thrives in Adelaide’s heat and dry soils. It provides fast, dense coverage, striking seasonal flowers and year-round greenery with almost no ongoing care—perfect for fences, trellises, large screens and tough spots where other climbers may struggle.