Costa celebrates the ABC's 90th; Millie prunes myriads of roses; Jane visits a historical horticultural society; Josh focuses on conservation at a zoo; Sophie explores a native garden; Tino shows how to love shrubs.

Costa visits the hidden garden of a renowned landscape designer; Sophie meets a grower of the prettiest produce; Jane tours a native mint collection; we meet an ecologist sharing the secrets of her biodiverse backyard.