Gunnera Tinctoria: The Giant Rhubarb
Introduction
Gunnera tinctoria, commonly known as giant rhubarb, is a spectacular herbaceous plant that can add a touch of drama to any garden. With its massive, rhubarb-like leaves and architectural form, it’s a plant that’s hard to miss.
Description
Gunnera tinctoria is a deciduous plant, meaning it loses its leaves in autumn. It can grow up to 1.5 meters in height and 2.5 meters in spread, making it a truly impressive specimen. The leaves are the most striking feature of the plant, with their large, deeply lobed shape and serrated edges.
Growing Conditions
Gunnera tinctoria prefers moist, boggy soil and can tolerate a wide range of pH levels. It can be grown in full sun, partial shade, or dappled shade, but it will produce the largest leaves in full sun.
Invasive Potential
Gunnera tinctoria is considered an invasive plant in the British Isles. It can spread rapidly by seed and can quickly take over an area. Gardeners should be aware of this potential and take steps to prevent the plant from spreading beyond their gardens.
How to Control Gunnera Tinctoria
If you have Gunnera tinctoria in your garden and want to remove it, the best thing to do is cut it back completely and then dig it out. You can also stop it from spreading by cutting off the flowerheads in summer before they set seed.
Similar Plants
If you’re looking for a plant with a similar effect to Gunnera tinctoria but without the invasive potential, consider Rheum palmatum or Crambe cordifolia. These plants have large, architectural leaves that can add a dramatic touch to your garden.
Wildlife Value
Gunnera tinctoria has no particular known value to wildlife in the UK. It does not attract birds, cats, dogs, horses, livestock, or people.
Toxicity
Gunnera tinctoria is not known to be toxic to humans or animals. However, it’s always best to err on the side of caution and avoid ingesting any part of the plant.
Conclusion
Gunnera tinctoria is a striking and architectural plant that can add a touch of drama to any garden. However, gardeners should be aware of its invasive potential and take steps to prevent it from spreading beyond their gardens. If you’re looking for a plant with a similar effect but without the invasive potential, consider Rheum palmatum or Crambe cordifolia.
