Gunnera manicata 200mm

Gunnera manicata, also known as Brazilian giant rhubarb, is a dramatic, clump-forming perennial prized for its massive, architectural leaves and prehistoric presence in garden landscapes.

Key Features

• Dimensions: 2.5–3m H × 3–4m W
• Growth Habit: Large, bold, herbaceous perennial forming sprawling clumps
• Foliage: Enormous, palmate leaves typically 1.2–2m wide with rough margins and spiny undersides
• Flowers & Fruits: Tiny red-green flowers in large, cone-shaped panicles (up to 1m tall) appear in early summer, followed by small round fruit
• Position: Full sun to part shade
• Soil: Prefers moist to wet, rich, slightly acidic soils; tolerates clay and loam; thrives near ponds or streams
• Maintenance: High water needs; mulch roots in winter for protection, especially in cooler areas; leaves die back in winter, regrowing in spring; occasional spring clean-up required.

Uses

Spectacular statement for bog gardens, stream margins, large borders, and damp sites. Suited to informal, cottage, and natural-style gardens, bringing a lush, Jurassic feel to any space.

Climate Suitability

Originates from mountainous regions of southern Brazil. Best suited to cool temperate and southern Australian regions with ample moisture—especially VIC (including Ballarat), NSW, ACT, TAS, and damp microclimates in SA and southern WA. Not frost hardy in exposed sites; protect bases in winter. Can be invasive in very moist climates.

Fun Fact

The leaves of Gunnera manicata can grow over 2m wide on mature plants, making them among the largest in any cultivated garden. Not related to edible rhubarb, but admired for the exotic foliage and prehistoric texture.