Gunnera manicata - Web page Navigation - Giant Rhubarb Page

Gunnera manicata, commonly known as Giant Rhubarb, is a spectacular herbaceous perennial that offers an awe-inspiring addition to any garden. With its enormous leaves, which can span 6-8 feet across, this native of southern Brazil stands as one of the largest herbaceous perennials on Earth, reaching heights of 6-10 feet and a spread of up to 14 feet. The leaves are richly textured, prominently veined, and sit atop sturdy, prickly, reddish-hairy stalks, providing an unmatched architectural quality to your landscape. They run a bright red in the fall. In early summer, the plant surprises with showy, thick conical panicles of tiny, reddish-green flowers, adding further intrigue.
Ideal for bog gardens, water gardens, or rain gardens, Gunnera thrives in consistently moist, humus-rich soils and appreciates part shade. It holds a particular affinity for areas near ponds or streams, where humidity helps maximize its growth. Despite its massive presence, this plant is easy to maintain, requiring moderate effort to remove dead leaves and an occasional check for slugs. For those in cooler climates, safeguarding the plant over winter is key: mulch the crown or move container-grown specimens indoors. Unrivaled in its visual impact and botanical wonder, Giant Rhubarb is a must-have for any garden enthusiast seeking that bold, vivacious centerpiece.