Weeds are plants that are growing in the wrong place. Certain species can totally devastate farmers crops, resulting in huge losses of both productivity and income for the farmers. They can be the difference between survival and failure of a farm. But are they all bad?

Tom Radford is a forager who spends his life travelling around in his van making social media content on plants that are largely unknown but have amazing folklore attached. He talks us through some of the tastier edible species. Sledge Taylor farms cotton in Mississippi in the US; Guy Smith is an arable farmer in the Southeast of England.

Both are blighted by weeds that would, given the right conditions and without proper crop protection, put them out of business. Padma Commuri is one of the team of R&D at BASF whose job it is to strive to predict what species are coming down the line and how they will interact with a changing climate. It’s a bit of crystal ball gazing coupled with some scientific knowledge that will keep farmers in production and billions of mouths fed in the coming decades.