Must have been ideal conditions for it in your case and maybe it happened to be a particularly vigorous/fast-growing variant!? I have heard that it can be hard to get the seeds to germinate (sounds like it was working without troubles on your property!) I'd actually be kinda happy if it took over most of the grass at my place though I reckon! :)
Tweed Valley in NNSW so lots of water and volcanic soil
Edit: turns out the Blue Quandong and the Quandong are very different species - my mistake
I wondered, since quandong sounds like an Aboriginal word, whether it might be similar to what happened with the word 'sapote' in South American fruits. I have heard that it means 'soft fruit' and hardly any of them are even related species!: White Sapote (ice-cream fruit, it's amazing, related to citrus) Black Sapote: might not quite live up to the name chocolate-pudding-fruit, but a perfectly ripe one is still delightful imo, related to persimmon) I haven't tried Mamey Sapote yet or any others.. something to look forward to! :)
I'm envious of that volcanic soil! Quite clay-y in the Adelaide Hills.. I have had a white Sapote in the ground for years and it's still less than 1m tall :/ don't know if it will ever fruit.. should care for the soil better I'm guessing, that might get it going :)
North New South Wales??? Or interesting compass direction?0