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Description
Gunnera, also known as giant rhubarb, is a genus of large-leaved perennial plants native to South America. It belongs to the family Gunneraceae, which consists of only two genera, Gunnera and Panke. Gunnera species are known for their huge leaves that can grow up to 10 feet in diameter, making them an impressive addition to any garden or landscape. The plants also produce cone-like inflorescences, which are covered in small flowers that bloom in the summer.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Angiosperms |
| Class | Magnoliopsida |
| Order | Gunnerales |
| Family | Gunneraceae |
| Genus | Gunnera |
Appearance
Gunnera plants are known for their large leaves that can grow up to 10 feet in diameter. The leaves are deeply lobed with a rough texture and can be green or reddish in color. The plants also produce cone-like inflorescences that can reach up to 6 feet in height. The inflorescences are covered in small flowers that bloom in the summer and are usually green or red in color.
Care Guide
Gunnera plants require moist soil and prefer partial to full shade. They are hardy in USDA zones 7-10 and can tolerate temperatures down to 10°F. Here are some tips for caring for Gunnera plants:- Water: Gunnera plants require consistent moisture, so water them regularly to keep the soil moist. Avoid letting the soil dry out completely.- Fertilization: Fertilize Gunnera plants in the spring with a balanced fertilizer. Avoid fertilizing in the fall, as this can encourage new growth that may be damaged by frost.- Soil: Gunnera plants prefer rich, organic soil that is well-draining. Amend the soil with compost or other organic matter before planting.- Sunlight: Gunnera plants prefer partial to full shade, as they can be easily burned by direct sunlight.- Hardiness Zones: Gunnera plants are hardy in USDA zones 7-10 and can tolerate temperatures down to 10°F.
Common Pests & Diseases
Gunnera plants are relatively pest and disease-free, but they can be susceptible to fungal diseases such as powdery mildew and rust. Here are some tips for preventing and treating common pests and diseases:- Powdery Mildew: This fungal disease can be prevented by ensuring good air circulation around the plants and avoiding overhead watering. If powdery mildew does occur, treat it with a fungicide.- Rust: This fungal disease can be prevented by removing infected leaves and avoiding overhead watering. If rust does occur, treat it with a fungicide.
Habitat
Gunnera plants are native to South America and can be found growing in wetlands, bogs, and other moist areas. They prefer cool, moist climates and are often grown as ornamental plants in gardens and landscapes.
Question and Answer
Q: How fast do Gunnera plants grow?
A: Gunnera plants can grow up to 3 feet in a single growing season, depending on growing conditions.
Q: Do Gunnera plants need a lot of water?
A: Yes, Gunnera plants require consistent moisture and prefer moist soil. Avoid letting the soil dry out completely.
Q: Can Gunnera plants tolerate full sun?
A: Gunnera plants prefer partial to full shade, as they can be easily burned by direct sunlight.
Q: Are Gunnera plants invasive?
A: Some species of Gunnera have become invasive in certain areas, so it’s important to check with your local extension office before planting them.
Related Plants
– Panke- Rheum- Rumex- Astilboides- Darmera
References
– “Gunnera.” Missouri Botanical Garden. Accessed June 17, 2021. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b788.- “Gunnera.” Plant Delights Nursery. Accessed June 17, 2021. https://www.plantdelights.com/collections/gunnera-perennial-plants.
