Diarmuid Gavin invites us into his own garden paradise, encouraging everyone across the country to get gardening together. He’ll be taking calls, answering questions and offering dozens of great practical tips. This week Diarmuid helps design a garden for Mary Fitzpatrick, in County Wicklow, who has a challenging space at the front of her house. He also offers advice for gardeners with a bit of help from plant expert Helen Dillon, and creates a sunken fire pit and seating area in his garden.