There is some stuff on the forum if you do a search, but since I've already researched it, I will sum it up for you. It might grow, but will probably freeze to death. If it does fruit, the fruit will probably not get ripe, as the climate is not warm enough. However there are fruiting trees in Orange Country, but not many, and I don't think it is know if the fruit ripens. I wouldn't worry about an invasive root system, if it lives that long, that will be good problem. For soil, the LA dirt will do, water should be about the same as most fruit trees, more in the summer, less in the winter. Since it's a random seed found at the market, It might not even be a jackfruit! You can buy slightly more cold resistant varieties, or maybe you will get lucky, and your seed with turn into the first tasty so cal jackfruit.