How do I get red cedar root balls to spread? What gardening task do the panel find daunting? What are the panel’s thoughts about composting organic materials?

Kathy Clugston and her team of horticultural experts travel to the University of Exeter for a postbag edition of GQT.

While Curator of Horticulture Anthony Cockell leads Kathy and the panel around the grounds, they also dig through the GQT inbox to answer your gardening queries. On the panel this week are garden designer Chris Beardshaw, grow your own guru Bob Flowerdew, and proud plantswoman Christine Walkden.

Later in the programme, the panellists discuss the University of Exeter's national collection of Azaras, share tips on how they can add structure to the garden and provide a sensory experience.

Senior Producer: Bethany Hocken

A Somethin' Else production for BBC Radio 4