Among the most popular ones that you're most likely to come across in supermarkets are curly, Tuscan, and Russian red kale. The difference between these three varieties is obvious from the moment ...

Kale varies in color from pale yellowish to deep green through deep steely blue to purplish red and almost black. It is usually classified according to leaf form and texture. Scotch types have ...

Curly kale is available from September to March. Other varieties of kale include Red Russian kale, cavolo nero (or ‘black kale’), and thousand-head or hungry-gap kale. Curly kales deteriorate ...