Coolibah Swamp: Costa visits a group in Alice Springs who are restoring the health of a local waterway that's a central part of the town's culture. Water Plants: Josh shows how to build a containerised water garden that's not only productive but is a habitat for frogs, fish and insects as well. Blending In: Jane explores the largest green roof in the southern hemisphere, at the Victorian desalination plant. Master Grafter: Jerry visits a grower to find out how grafting is used to create prolific fruit trees. A Touch of Green: Tino finds out how Australian scientists at Casey Station in Antarctica grow a variety of fresh produce all year round.