Chris talks to Fergus Garrett, head gardener at Great Dixter, about the incredible diversity of life that calls this world-famous garden home. The garden, created by the late plantsman and writer Christopher Lloyd (known affectionately as 'Christo') is well known as a treasure-trove of plants, but it has only recently become apparent that it's also fantastically rich in biodiversity. Meanwhile at Wisley, horticulturist and garden manager Emma Allen shares her favourite summer-flowering trees and offers advice on how to plant them now that the main tree planting season is fast approaching. For more info and useful links see www.rhs.org.uk/thegardenpodcast