Gunnera insignis, also known as Giant Rhubarb or Dinosaur Plant, is a striking architectural plant known for its giant, paddle-shaped leaves and bold presence. Each leaf can reach up to 6 feet wide, creating a prehistoric aesthetic perfect for water features, tropical-themed gardens, and dramatic landscape focal points.
This perennial thrives in moist, rich soils and high-humidity environments, making it ideal for planting along streams, ponds, or damp shaded areas. In summer, Gunnera insignis produces impressive red flower spikes up to 3 feet tall, adding additional flair to this already colossal plant.
A stunning choice for adventurous gardeners, botanical collectors, and those seeking a truly unique garden centerpiece.
Features
- Massive leaves up to 6 feet wide for instant landscape impact
- Unique red flower spikes up to 3 feet tall in summer
- Ideal for water gardens, shade gardens, and large landscape spaces
- Non-GMO, rare seeds for collectors and enthusiasts
- Long-lived perennial in suitable climates
Specifications
- Seed Type: Giant ornamental perennial herb seeds
- Botanical Name: Gunnera insignis
- Common Names: Giant Rhubarb, Dinosaur Plant, Ornamental Gunnera
- Plant Type: Perennial in warm climates
- Plant Height: 5 – 10 feet tall
- Leaf Size: Up to 6 feet wide
- Flower Height: Up to 3 feet (red flower spikes)
- Zones: USDA Zones 8 – 10 (can be grown as annual in cooler areas)
- Light Requirement: Partial shade to full sun (with plenty of moisture)
- Soil Type: Moist, rich, well-draining soil
- Germination Time: 30 – 60 days
- Days to Maturity: 2 – 3 years to full size
- GMO Status: Non-GMO
- Season: Spring sowing
- Planting Depth: Surface sow; press lightly into soil
- Spacing: 6 – 10 feet apart
- Optimal Temperature: 65°F to 75°F (18°C to 24°C)
- Watering: High moisture levels; do not permit soil to dry out
- Companion Plants: Hostas, Ferns, Astilbe, Canna
- Uses: Water gardens, landscape focal point, exotic gardening, shade gardening
- Storage: Store seeds in a cool, dry location until planting
Planting Guide
- Seed Prep: Surface sow on moist soil; do not cover with soil.
- Germination Requirements: Provide humidity, warmth, and indirect light until germination.
- Transplanting: Move to a large container or sheltered outdoor site once roots develop.
- Location: Best in rich, consistently damp soil near water features or shaded spaces.
- Watering: Keep soil damp; mulch to retain moisture during hot months.
- Winter Care: In colder zones, lift or heavily mulch base to prevent frost damage.
