 The rhizomes and leaves are good fodder for cattle and pigs and it is grown for this purpose in Tropical Africa and Hawaii, where it is harvested 4–8 months after planting.The foliage of Agricultural Canna is also used for its silage making properties, which are superior to those of corn.Canna is still grown for human consumption in the Andes and also in Vietnam and southern China, where the starch is used to make cellophane noodles.