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    Giant Rhubarb

    Gunnera manicata

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    Giant Rhubarb (Gunnera manicata) at Dutch Growers Garden Centre

    Giant Rhubarb foliage

    Giant Rhubarb foliage

    (Photo courtesy of NetPS Plant Finder)

    Height:  10 feet

    Spread:  10 feet

    Sunlight:  full sun  partial shade 

    Hardiness Zone:  8a

    Other Names:  Brazilian Gunnera


    A gorgeous specimen plant for a large garden area; massive leaves on stalks rise up to 10 feet and unfurl up to 6 feet wide; it loves moist to wet enviroments so it is great alongside a pond; can be invasive in moist warmer climates;

    Ornamental Features

    Giant Rhubarb's attractive enormous serrated lobed palmate leaves remain green in colour throughout the year. Neither the flowers nor the fruit are ornamentally significant.

    Landscape Attributes

    Giant Rhubarb is an herbaceous evergreen perennial with an upright spreading habit of growth. Its wonderfully bold, coarse texture can be very effective in a balanced garden composition.

    This plant will require occasional maintenance and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

    • Invasive
    • Self-Seeding

    Giant Rhubarb is recommended for the following landscape applications;

    • Accent
    • Mass Planting
    • General Garden Use

    Planting & Growing

    Giant Rhubarb will grow to be about 10 feet tall at maturity, with a spread of 10 feet. It has a low canopy with a typical clearance of 2 feet from the ground. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 8 years.

    This plant does best in full sun to partial shade. It prefers to grow in moist to wet soil, and will even tolerate some standing water. It is not particular as to soil pH, but grows best in rich soils. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This species is not originally from North America.

    At Dutch Growers, we treat this plant as a "HOBBY PLANT". It is not officially recognized as winter-hardy in our zone 3, however, there is a strong liklihood that it will survive winter. Warranty expires on Nov. 1 season of purchase.

    Hardiness Zone Plant Height Minimum Sunlight
    Accent  Massing  Garden 
    Foliage Color  Texture 
    Ornamental Features

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