Horticultural programme featuring a group of gardening experts, hosted by Kathy Clugston. Bob Flowerdew, Christine Walkden and James Wong answer questions from green-fingered listeners. This week, the panellists suggest the best trees to grow for toothbrush handles, discuss why two acorns from the same tree can produce such different plants and identify an interesting looking fungus. Away from the questions, Humaira Ikram is at the Olympic Park finding out about its wildlife legacy since 2012, Matt Biggs gives his top tips for using Christmas leftovers in the garden, and Dr Chris Thorogood has the ultimate gardener's hangover guide. Producer - Daniel Cocker Assistant Producer - Jemima Rathbone A Somethin' Else production for BBC Radio 4