How We Have Grown: Costa looks back on a successful first year On The Verge and celebrates with his neighbours with a street party.Celebrating Tasmanian Plants: Tino visits a regional botanic garden built by the community near Hobart that showcases the diversity, colour and adaptability of plants from Tasmania's South East.Gardener of the Year: Costa announces the 2012 Gardening Australia 'Gardener of the Year'.Summer at Home: Sophie brings herbs and flowers to the table with a specially built planter inserted in the middle and has friends over for lunch to celebrate the start of summer.A Tribute to Colin: Gardening Australia celebrates the life of much loved presenter Colin Campbell who passed away in August, and looks at the enduring contribution he made to Australian gardening.