I used to buy from Bunnings but, since branching out into the Australian natives, I have a local native plant nursery that I frequent in the next suburb across from me here in Newcastle/Lake Macquarie. Shout out to www.newcastlewildflower.com.au/ (Newcastle Wildflower Nursery at Glendale).
I also buy seedlings online at https://plantsinabox.com.au/ (Plants in a Box) and they’ve never done wrong by me.
Do you grow your own from seed? Garage sales? Where do your best plant finds come from? There is a plant exchange up the road from me here that I need to check out. Take a plant, leave a plant.
Quick stuff at bunnings, better stuff at GardenExpress, native edibles at Daleys seeds at TheSeedCollection and some FruitSaladtrees a couple of years ago.