Gunnera Seeds - Flower Plant For Home Gardens

Gunnera, commonly known as Giant Rhubarb, is a large perennial ornamental plant valued for its massive leaves and bold garden presence. The plant forms a clump of thick stems supporting very large, textured leaves that spread widely across the garden space. During the growing season, tall flower spikes emerge from the center of the plant carrying dense clusters of small flowers. Gunnera grows best in moist, fertile soil with partial to full sunlight and performs well near ponds, water gardens, or consistently moist garden beds.

Features

• Large perennial plant with broad, textured leaves

• Produces tall flower spikes with dense clusters of small flowers

• Suitable for water garden edges and moist garden beds

• Forms a bold clumping growth habit

• Adapted to environments with consistent soil moisture

Specifications

• Scientific Name: Gunnera manicata

• Common Name (US): Giant Rhubarb

• Seed Type / Variety: Ornamental plant seeds

• Growth Habit: Large clump-forming perennial

• USDA Zones: 7 to 10

• Planting Season: Spring

• Growing Season: Spring through autumn

• Sowing Season:

  • Zones 7 to 10: March to May

  • Indoor controlled environment: Year-round

• Germination Time and Conditions: 15 to 30 days at 18 to 22 C in moist seed starting mix

• Sunlight Requirements: Full sun to partial shade

• Soil Requirements: Moist, fertile, well-drained soil rich in organic matter

• Watering Needs: Regular watering to maintain consistently moist soil

• Mature Plant Size: 6 to 10 feet height; 6 to 10 feet spread

• Plant Spacing: 6 to 8 feet between plants