Canberra is not the ideal climate for chestnut trees. The annual rainfall here is about half what it is in the eastern US, and there are soil fungi in some areas which will kill their roots. Never-the-less, after a few years of false leads, last autumn, I managed to get my hands on a few seedlings. I planted three in my yard. The first, planted in the chook pen, leafed out in spring, but never really grew much, and during the February-March dry spell, it turned brown and shriveled up.
The second tree is in the western corner of the yard, where it is exposed to both the hot westerly winds and the cold southerlies. While it didn't grow much, It did hang onto its leaves until the first cold night, and it is now changing color. I don't know how it will cope with the native acacias around it, and whether their shade will help reduce evaporation or their competition for moisture will hinder, but it seems to have made it through the first year.