Walsham Le Willows
Peter Gibbs chairs this horticultural Q&A from Walsham Le Willows in Suffolk. We revisit Bob Flowerdew's laboratory garden to find out about inarching grafting and weed-killing carpets.
Matthew Wilson turns everything on its head at the upside-down garden in Hampton Court.
In addition, why not to grow carrots into compost; how to keep your cyclamen going and how best trim a box hedge.
Produced by Lucy Dichmont
A Somethin' Else production for BBC Radio 4.