Kale is popular for its health and versatility, and because it can be consumed raw, baked, blended or sauteed.

Among the most popular ones that you're most likely to come across in supermarkets are curly, Tuscan, and Russian red kale.

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 ...