This week David Maxwell and the Gardeners' Corner roadshow team head to Ballygawley where members of Castlecaulfield Horticultural Society put their questions to Brendan Little and Averil Milligan. Amongst the gardening topics are growing hydrangeas as a hedge, pruning rhododendrons and how to deal with whitefly as well as lots of tips for the week ahead. That's Gardeners' Corner on Saturday morning just after the 9 o'clock news on BBC Radio Ulster and BBC Sounds.