The turnip or white turnip (Brassica rapa subsp. rapa) is grown in temperate climates worldwide for its white, bulbous taproot. Small, tender varieties are grown for human consumption, while larger varieties are grown as feed for livestock. Fresh turnips are one of the popular root vegetables notably rich in vitamin-C. The tuber, and its top greens are good source of minerals like manganese, calcium and vitamins such as folates, and pyridoxine. 35 to 55 days to harvest.