Jerry is with an environmental weed expert in a patch of local Brisbane bush to take a look at plants that have escaped from home gardens, Costa meets a suburban forager who's passionate about edible plants in the wild and John visits John Arnott at the Royal Botanic Gardens Cranbourne to find out more about myrtle rust - a fungal disease that could threaten a huge range of Australian plant species. Also, Josh gets stuck into some spring work in his garden to ensure a healthy season, free of pests and disease while Sophie visits a lettuce farm to see how cleverly designed native planting has reduced pest and disease problems.
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