When is the best time of year to visit Tarra-Bulga? I would argue any time of year could be the answer as each season tends to bring its own particular highlights.
In spring you have lots of fresh new growth and it is the peak time to catch most things in flower. In summer the shady rainforest gullies are an ideal retreat from the heat. In autumn, the diversity of fungi adds to the experience. In winter, everything is lush and green. After rain, cascading mini waterfalls in unexpected places can add to the spectacle. It is also the time when Lyrebirds are putting on displays.