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In this Halloween programme, David Maxwell leaves the garden for the farm in the hunt for the perfect pumpkin. He chats to Adrian McGowan in Killinchy, who’s grown 9 acres of them about the varieties that grow best in more northern climes. David also heads to the National Trust’s Florence Court in county Fermanagh where head gardener David Corscadden is planting Camassia bulb with volunteers from near and far. Also on the programme, Cherry Townsend joins David to answer listeners’ questions; autumn in Ballyrobert cottage garden with Maurice Parkinson and just how many types of mint can you name? gardenerscorner@bbc.co.uk