It's a cheap, home-grown "super vegetable" that retailers are predicting will be one of this year's hottest food trends after surging sales over the winter. It is now cool to eat kale, following the endorsement of chefs and celebrities including Gwyneth Palthrow who has popularised its use in "green" smoothies.
Marks & Spencer says sales of kale are already up a third (32%) on the same period last year and it expects this rise to continue in the longer term. In order to meet growing demand, the supermarket has boosted its range beyond the fresh, bagged vegetable and – not for the faint-hearted – is planning its own-brand kale crisps later in the year.
In all this chin-stroking over a green leafy vegetable, we found this awesome graphic:
So, curious minds want to know: What led to the great carrot spike of the late 1990s?