CANBERRA CENTENARY SPECIAL In Gardening Australia's second special for the year, Costa, Sophie and Angus visit Canberra to explore the art of gardening and the science of horticulture by visiting some of the nation's most innovative institutions. Representing Australia: Sophie visits the Australian National Botanic Gardens to find out how plants from all around country are being grown in Canberra's challenging climate. 100 Forests: Costa visits the National Arboretum to investigate their collection of rare, threatened and culturally significant trees and learns about their efforts to preserve them for future generations. Living the Land: Costa meets a Ngunnawal ranger to learn how traditional owners managed Canberra's landscape for thousands of years, and how the same techniques are still being passed down and used today. A Centenary Bell: Sophie finds out about the Canberra Centenary floral emblem from the man who bred it. The Next Frontier: Angus is visiting CSIRO's Black Mountain Laboratories to discover how the scientists are looking below the ground to find ways to improve crop production, as well as how their groundbreaking research can help gardeners at home.