Plants might not seem like front-line weapons in our fight to stay healthy, but as our contributors to this week's programme show, green is good for everything from coronavirus to PTSD.

My Little Allotment Kirsty Ward tells the story of how she used an allotment to help her rebuild her mental health after being diagnosed with PTSD following a traumatic childbirth experience. Nurse Kate Tantam (who cared for the 84 year old explorer we featured in last week's show as he was recovering from Covid-19) explains how and why hospital gardens are so good for patients. Plus RHS Young Ambassador George Hassall shares his love of the Acer (Japanese maple).