With The Open championship taking place on County Antrim’s north coast, David Maxwell gets some top tips on grass keeping from those who prepared the Royal Portrush course for the world’s top golfers. With Ash dieback now present across the country, a question from a caller prompts the team to look at the latest research suggesting there may be some hope for our Ash trees. Kathryn Gaw reveals the hidden bounty of a forest within Belfast’s city limits when she takes David foraging. As well as discovering that nettles have a gender, there’s a surprising garden use for brambles. Adam Frost reveals his favourite shrub for July and Mary Doris joins David in studio to answer questions. Email the programme at gardenerscorner@bbc.co.uk