This week David gets a masterclass in the art of cloud pruning. He finds out why it's time to abandon precision pruning and spirit level accuracy for something more freestyle, natural and altogether less stressful. Also on the programme, the listener who wants to turn bumpy apples into a bumper crop, Tony Kirkham selects his tree of the month at the Chelsea Physic Garden and why organic grower Klaus Laitenberger is on a Greek Odyssey to find forgotten veg. You can contact David and the team on gardenerscorner@bbc.co.uk