Talking Trees: Costa talks backyard tree selection and maintenance with a renowned arborist. Zucchini and Onions: Tino shows how to overcome zucchini problems and how to grow an unusual variety of perennial onion. Keeping Active: Josh visits a retired couple who are actively involved in Kings Park volunteer groups as well as their own thriving native garden. At War With Weeds: Sophie demonstrates how to tackle annual and perennial weeds efficiently and effectively. Maintaining Raspberries: Tino shows how to maintain and divide raspberry canes for a bumper crop. East Meets West: John visits a bayside garden on Victoria's Mornington Peninsula whose owners are successfully growing Western Australian natives.