At the greenmarket, it’s still mostly potatoes and apples. There are no tender greens, fava beans, peas, asparagus, artichokes, sorrel, rhubarb or early strawberries. Those harbingers of the season are said to be full of chi, or qi, the Chinese word for life force. We’re craving them as we’re craving lighter, brighter-tasting meals, food that is greener and fresher.
Source: wiktionary