A sweet, seedless watermelon that fits easily in your fridge has been created by US researchers. The 12-centimetre mini-melons, created by normal breeding, have already gone on sale in some parts of the US.

The mini-melons also have a thinner rind and a uniform flavour throughout the fruit. In contrast, traditional water-melons tend to concentrate the flavour in a “sweet spot” in the middle, says John Sorenson of Syngenta Seeds, the company that has developed the variety at its labs in Boise, Idaho, over the past four years.