Germplasm Varieties may have white or yellow flesh, and outside crown may be white, green or purplish-red. Purple Top White Globe' is recommended for tropics. Brassica rapa subsp. Brassica rapa subsp. Brassica rapa subsp.
Field mustard is a weed or ruderal in much of Europe, native to Asia.
Distribution Cultivated in Europe for over 4000 years, probably native to central and southern Europe, now spread throughout world, including most parts of the tropics. Ecology Turnip is basically a cool climate crop, resistant to frost and mild freezes. Grown as a spring or fall crop throughout the United States. Short growing season makes them very adaptable as a catch crop. Cultivate shallowly for weed control.