Gunnera

These perennials are mainly grown for their beautiful foliage. Gunnera (commonly known as the Giant or Prickly Rhubarb) isn't hardy in very cold climates; they are natives of South America, South Africa, Tasmania, Abyssinia, Java, New Zealand and Hawaii. The natives of South America eat the thick leafstalks of G. manicata and G. chilensis either raw or cooked; they are known as Pangue. The Rhubarb used to make pies, tarts, etc. is Rheum rhabarbarum (go see). G. manicata is a huge plant, growing up to 6 feet high with a spread of 10 feet or more. It grows slowly and produces rounded, lobed dull green leaves, which are heart-shaped at the base, on prickly leaf stalks; they will grow 5 feet across. The tiny, light green flowers grow in conical spikes in early summer.

Pot Cultivation

These plants need deeply cultivated, moist, fertile soil, in a sheltered location. Gunneras are great for waterside planting and other moist places. The crowns of these plants should be protected in the winter by mulching with dead leaves.

Propagation

Seeds should be sown in the spring or fall.