The University of Illinois Extension website recommends harvesting turnips when the root vegetables are about 2 to 3 inches in diameter, while they are still mild-tasting and tender. Turnips are best grown as a fall crop and are hardy enough to withstand several light freezes before harvesting.
About this Author
Mary Osborne has been an educational quiz writer for more than eight years and a short-fiction writer for more than 20 years. She also reads and scores essays for several standardized tests and has written and illustrated two children's books. Her short stories have appeared in literary journals such as "The Minnesota Review" and in the "Orlando Sentinel" newspaper.