The Old Mill House garden, what to do with a glut and tree of the month

With late summer approaching David is joined in studio by Reg Maxwell to take questions on everything from sickly tomatoes to Oh la la clematis. He finds out about the Old Mill garden in Helen’s Bay which is being lovingly restored alongside an abandoned walled garden and Tony Kirkham picks his top tree for August. Contact the programme on gardenerscorner@bbc.co.uk