Lettuce at more than $10 a head could soon be a thing of the past, thanks to a $56 million cash injection into automated vertical farming business Stacked Farm, which will increase the production of leafy greens in Australia.

Flooding and supply chain problems forced KFC to put cabbage in its burgers in lieu of lettuce last month, and products such as spinach and lemongrass have been in short supply in some supermarkets.