It's springtime in County Down, where Anita Rani and Joe Crowley meet the Mackies of Mahee Island during the first of four seasonal visits this year. Anita gets a tour of the family's very own arboretum and is introduced to the art of a well-known friend, while Joe lends a hand on the farm as the cattle head to the fields for spring. He also hears from the family's conservationist about how they created their own wetland – one of Northern Ireland's wildlife treasures. Also, Tom Heap investigates how the war in Ukraine has sparked a surge in the cost of fertiliser which could affect the price of the food on our plates.