Gardeners' Question Time - 11/09/2009

Eric Robson chairs the popular horticultural forum. Chris Beardshaw, Anne Swithinbank and Matthew Biggs answer questions sent in by post at the Gardeners' Question Time potting shed at Sparsholt College in Hampshire. If you are eternally battling the dreaded Japanese Knotweed, Dr Richard Shaw has some ideas about a new bio control. Plus the latest news on the garden trials with Sparsholt College's Rosie Yeomans, including an update on our treasured courgettes and plans for over-wintering Dahlias. Including Gardening weather forecast.