Gardening Australia's Josh Byrne joins Di Darmody in the studio to tackle roots, shoots and everything in between. 

21:12 What's causing my celery's hollow stalks? 

35:07 What's the best way to prevent pest and disease on fruit trees? 

37:12 What NOT to put on your native plants. 

Listen to the program live on Saturdays at 9:00AM on ABC Radio Perth and ask your questions by calling in on 1300 222 720 or text 0437 922 720

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