Diarmuid and Helen are in Counties Down and Antrim where they cast their expert eyes over a compartmentalised paradise behind a Georgian terrace house in Hillsborough, a reclaimed quarry in Carrowdore and an ambitious river landscape in rural Antrim.

Diarmuid and Helen visit County Londonderry and North Antrim. They enjoy a Jane Austen-style Georgian garden in Derry, a bijou Islamic-style sanctuary in Portstewart and great lakeside splashes of colour near Glenwherry.

In County Down, Diarmuid and Helen visit a large estate on the banks of Strangford Lough, an eccentric garden dominated by alpine rock plants behind a modest house in Bessbrook, and finally Castlewellan, where they encounter a mature garden peppered with lots of comic touches.