In this week's Gardeners' Corner Helen Mark and the roadshow team head to the village of Glenavy in Co. Down to the former birthplace of John Ballance, 14th premier of New Zealand. In the beautifully restored Cottage room of the house, Ann Fitzsimons and Neil Porteous answer questions from the audience made up of members and friends of the Ulster New Zealand Trust. Also in the programme tips for the gardening week ahead. That's Gardeners' Corner this Saturday morning just after the 9 o'clock news on BBC Radio Ulster.