Kathy Clugston and an esteemed panel of gardening experts are in St Mary's Church in Walthamstow to answer the questions of a green fingered audience.

Joining Kathy on the panel are garden designers, botanists and alotmenteers James Wong, Matthew Biggs and Frances Tophill.

Later, Matthew Pottage provides a list of thriving trees that are sweeping the streets of London.

Producer: Matthew Smith

A Somethin' Else production for BBC Radio 4