In this week's programme, David Maxwell seeks out a new wildflower border that is turning heads in Rowallane Garden in Saintfield. He also visits the Tropical Ravine where an army of bugs have been released to help gardeners tackle plant pests. David also explores the large herbaceous borders in Belfast's Botanic Gardens with gardener Adrienne Armstrong. Also in the programme, Helen Mark visits Conrad McCormick's garden where he is experimenting with Asian veg and Reg Maxwell offers advice on summer rose care.